Step 4: Full View

Beyond the Board's finding that Engineer A's agreement to provide a separate defense-side report was unethical, the structural nature of the conflict reveals that no procedural remedy - including Engineer A's pledge to produce an independent report, his formal termination by Attorney Z, or his full payment of fees - could dissolve the ethical bar created by his prior confidential plaintiff-side engagement. The conflict is not merely procedural or remediable by disclosure; it is substantive and structural. Engineer A obtained confidential case strategy, analysis, and factual framing from the plaintiff's attorney during the initial engagement. That information cannot be mentally segregated from any subsequent analysis he might conduct, regardless of his stated intent. The framing of the defense report as 'separate' and 'independent' does not alter the underlying reality that Engineer A's analytical starting point, his knowledge of the plaintiff's vulnerabilities, and his awareness of the case's evidentiary landscape were all shaped by confidential access obtained in a fiduciary-adjacent capacity. The Board's conclusion therefore rests not merely on a rule against switching sides, but on the deeper recognition that the integrity of the adversarial proceeding itself is compromised when a forensic expert carries insider knowledge across party lines in an active matter.

The Board's conclusion is further deepened by examining the motivational structure of Attorney X's retention of Engineer A. Attorney X did not seek Engineer A because of his general forensic expertise or reputation in the field; he sought Engineer A precisely because he had learned of the circumstances of Engineer A's termination - specifically, that Engineer A's analysis pointed to plaintiff fault. This means Attorney X's retention was motivated by the desire to exploit Engineer A's prior confidential access and adverse findings, not merely to obtain an objective expert. Engineer A bore an independent ethical obligation to recognize this motivated retention as itself ethically problematic and to decline the engagement on that basis alone, separate from and in addition to the switching-sides prohibition. By accepting the retention without apparent scrutiny of Attorney X's motivations, Engineer A failed to exercise the pre-acceptance conflict screening that the NSPE Code and relevant BER precedents require. This failure compounds the primary violation: not only did Engineer A switch sides in an active proceeding, but he did so in a context where the very reason for his retention was his insider status - making the conflict not incidental but central to the engagement's purpose.

A nuance the Board did not explicitly address is the question of whether Engineer A had a pre-termination obligation to proactively disclose to Attorney Z that his findings were adverse to the plaintiff and to discuss the ethical implications of that situation before allowing the engagement to be passively terminated. The NSPE Code's requirements of honesty, objectivity, and avoidance of deception suggest that Engineer A's silence about the nature of his findings - simply allowing termination to occur without a full discussion of the ethical landscape - may itself constitute a partial ethical failure independent of the subsequent defense retention. Had Engineer A engaged in that pre-termination discussion, two consequences might have followed: first, Attorney Z and the plaintiff would have had the opportunity to provide or withhold consent to any future adverse participation, satisfying the consent-prerequisite mechanism embedded in the Former Client Adversarial Participation Prohibition; and second, Engineer A's own ethical obligations going forward would have been clarified and potentially altered by that disclosure. The absence of this pre-termination discussion left the plaintiff without the ability to exercise the consent mechanism that the Code implicitly preserves, and it left Engineer A without the moral clarity that such a discussion would have provided. This omission, while not the primary violation identified by the Board, reinforces the conclusion that Engineer A's conduct across the entire sequence of events - from initial termination through defense retention - reflected a systemic failure to engage with his ethical obligations as a forensic expert in an adversarial proceeding.

A nuance the Board did not explicitly address is the question of whether Engineer A had a pre-termination obligation to proactively disclose to Attorney Z that his findings were adverse to the plaintiff and to discuss the ethical implications of that situation before allowing the engagement to be passively terminated. The NSPE Code's requirements of honesty, objectivity, and avoidance of deception suggest that Engineer A's silence about the nature of his findings - simply allowing termination to occur without a full discussion of the ethical landscape - may itself constitute a partial ethical failure independent of the subsequent defense retention. Had Engineer A engaged in that pre-termination discussion, two consequences might have followed: first, Attorney Z and the plaintiff would have had the opportunity to provide or withhold consent to any future adverse participation, satisfying the consent-prerequisite mechanism embedded in the Former Client Adversarial Participation Prohibition; and second, Engineer A's own ethical obligations going forward would have been clarified and potentially altered by that disclosure. The absence of this pre-termination discussion left the plaintiff without the ability to exercise the consent mechanism that the Code implicitly preserves, and it left Engineer A without the moral clarity that such a discussion would have provided. This omission, while not the primary violation identified by the Board, reinforces the conclusion that Engineer A's conduct across the entire sequence of events - from initial termination through defense retention - reflected a systemic failure to engage with his ethical obligations as a forensic expert in an adversarial proceeding.

Regarding Q101: Engineer A had an affirmative obligation to proactively disclose to Attorney Z, before termination, that his findings pointed to plaintiff fault and to discuss the ethical implications of that situation. The NSPE Code's honesty and integrity provisions, combined with the forensic expert's non-advocate role, required Engineer A to communicate adverse findings transparently rather than simply allowing the engagement to dissolve. This pre-termination disclosure obligation was not merely procedural; it would have given Attorney Z the opportunity to understand the full scope of Engineer A's analysis, potentially invoke confidentiality protections more explicitly, and make informed decisions about how to handle the termination. By failing to engage in this discussion, Engineer A left the circumstances of his termination in a form that could be - and was - exploited by opposing counsel. The Board's conclusion that Engineer A violated switching-sides obligations is deepened by recognizing that the pre-termination disclosure failure was a contributing antecedent ethical lapse, not merely a background fact.

Regarding Q403: If Engineer A had raised the ethical conflict with Attorney Z before his services were terminated - specifically disclosing that his findings were adverse to the plaintiff and discussing the implications - this pre-termination disclosure would have altered his subsequent ethical obligations in meaningful but not dispositive ways. Such disclosure would have fulfilled the Switching Sides Full Discussion With Original Client Obligation, which the Board identified as violated. It would also have given Attorney Z the opportunity to explicitly invoke confidentiality protections, to document the scope of confidential information shared, and potentially to seek protective measures against subsequent adverse use of that information. However, pre-termination disclosure would not have eliminated the switching-sides prohibition or the former client consent prerequisite for subsequent defense engagement. What it would have done is place Engineer A in a cleaner ethical posture: having fulfilled his disclosure obligations to the original client, he would then face the remaining question of whether plaintiff consent had been obtained for defense engagement - and absent such consent, the defense engagement would remain impermissible. The pre-termination disclosure failure thus compounds the switching-sides violation but does not constitute its sole basis.

Beyond the Board's finding that Engineer A's agreement to provide a separate defense-side report was unethical, the structural nature of the conflict reveals that no procedural remedy - including Engineer A's pledge to produce an independent report, his formal termination by Attorney Z, or his full payment of fees - could dissolve the ethical bar created by his prior confidential plaintiff-side engagement. The conflict is not merely procedural or remediable by disclosure; it is substantive and structural. Engineer A obtained confidential case strategy, analysis, and factual framing from the plaintiff's attorney during the initial engagement. That information cannot be mentally segregated from any subsequent analysis he might conduct, regardless of his stated intent. The framing of the defense report as 'separate' and 'independent' does not alter the underlying reality that Engineer A's analytical starting point, his knowledge of the plaintiff's vulnerabilities, and his awareness of the case's evidentiary landscape were all shaped by confidential access obtained in a fiduciary-adjacent capacity. The Board's conclusion therefore rests not merely on a rule against switching sides, but on the deeper recognition that the integrity of the adversarial proceeding itself is compromised when a forensic expert carries insider knowledge across party lines in an active matter.

Regarding Q103: The confidential information Engineer A obtained during the plaintiff-side engagement is not truly segregable from any independent analysis he might conduct for the defense, and this mental segregation impossibility alone constitutes a sufficient independent bar to the defense engagement regardless of Engineer A's stated intent to produce an independent report. During his plaintiff-side engagement, Engineer A necessarily absorbed not only raw technical data but also the plaintiff's litigation strategy, the framing of the case, the specific vulnerabilities Attorney Z was concerned about, and the analytical pathways that led to adverse findings. These elements cannot be compartmentalized through an act of professional will. Any defense-side analysis Engineer A produces will inevitably be shaped - consciously or unconsciously - by his prior exposure to the plaintiff's confidential case architecture. The Confidential Information Mental Segregation Impossibility Recognition capability, which Engineer A failed to deploy, reflects a structural reality: the mind cannot un-know what it has learned in a confidential professional context, and the pledge to produce an independent report does not alter the cognitive contamination that has already occurred. This conclusion reinforces the Board's finding that the independent report framing cannot cure the underlying conflict.

Regarding Q104: The switching-sides prohibition does not extend indefinitely to all future matters in which Engineer A previously held a confidential plaintiff-side engagement, but it does persist for the duration of the same proceeding and likely for any matter in which the confidential information obtained remains materially relevant. Had the personal injury case been fully concluded and closed before Attorney X approached Engineer A, the ethical calculus would shift significantly, though it would not automatically become permissible. The Unrelated Matter Permissibility Boundary constraint establishes that Engineer A's prohibition is keyed to the same-matter identity of the proceeding. However, even in a concluded matter, the post-termination confidentiality obligation under Code Section II.1.c. would continue to bar Engineer A from deploying plaintiff confidential information in any subsequent context. The distinction is that in a concluded matter, there is no ongoing adversarial proceeding to contaminate, no active plaintiff position to undermine, and no structural conflict of divided loyalty - but the confidentiality duty itself survives. Thus, the prohibition has two analytically distinct components: the switching-sides bar, which is proceeding-duration-limited, and the confidentiality perpetuation obligation, which is indefinite.

Regarding Q401: Engineer A's acceptance of the defense retention would have been significantly more defensible - though not automatically permissible - if the personal injury case had been fully resolved and closed before Attorney X approached him. In a concluded matter, the proceeding-duration loyalty floor and the same-matter adversarial conflict prohibition would no longer be operative, because there is no ongoing proceeding to contaminate and no active plaintiff position to undermine through structural conflict. However, two residual ethical constraints would remain. First, the perpetual confidentiality obligation under Code Section II.1.c. would continue to bar Engineer A from deploying or relying upon plaintiff confidential information in any subsequent engagement. Second, Engineer A would need to assess whether the subject matter of any new engagement was sufficiently distinct from the concluded matter that his prior confidential knowledge would not materially influence his new analysis. If those conditions could be satisfied - if the matter were truly concluded and Engineer A could genuinely produce an analysis independent of his prior confidential knowledge - then the engagement might be permissible. The critical distinction is that the switching-sides prohibition is proceeding-duration-specific, while the confidentiality obligation is indefinite.

The Board's conclusion is further deepened by examining the motivational structure of Attorney X's retention of Engineer A. Attorney X did not seek Engineer A because of his general forensic expertise or reputation in the field; he sought Engineer A precisely because he had learned of the circumstances of Engineer A's termination - specifically, that Engineer A's analysis pointed to plaintiff fault. This means Attorney X's retention was motivated by the desire to exploit Engineer A's prior confidential access and adverse findings, not merely to obtain an objective expert. Engineer A bore an independent ethical obligation to recognize this motivated retention as itself ethically problematic and to decline the engagement on that basis alone, separate from and in addition to the switching-sides prohibition. By accepting the retention without apparent scrutiny of Attorney X's motivations, Engineer A failed to exercise the pre-acceptance conflict screening that the NSPE Code and relevant BER precedents require. This failure compounds the primary violation: not only did Engineer A switch sides in an active proceeding, but he did so in a context where the very reason for his retention was his insider status - making the conflict not incidental but central to the engagement's purpose.

Regarding Q102: Attorney X's deliberate targeting of Engineer A precisely because of his prior plaintiff-side engagement and the circumstances of his termination constitutes an ethically problematic exploitation of a structural conflict, and Engineer A bears independent responsibility for recognizing and refusing that motivated retention. The fact that Attorney X sought out Engineer A not for his general forensic expertise but specifically because he had reviewed confidential plaintiff materials and reached adverse conclusions transforms the retention from a routine expert engagement into a calculated attempt to weaponize the plaintiff's own confidential analytical process. Engineer A's capability to recognize adverse retention motivation was engaged the moment Attorney X disclosed the basis for his interest, and Engineer A's failure to exercise that capability - his Adverse Retention Motivation Recognition Deficit - constitutes a distinct ethical failure layered on top of the switching-sides violation. A forensic engineer of integrity must recognize when he is being retained not for his independent expertise but as a conduit for the opposing party's confidential information, and must decline such retention regardless of his stated intent to produce an objective report.

A nuance the Board did not explicitly address is the question of whether Engineer A had a pre-termination obligation to proactively disclose to Attorney Z that his findings were adverse to the plaintiff and to discuss the ethical implications of that situation before allowing the engagement to be passively terminated. The NSPE Code's requirements of honesty, objectivity, and avoidance of deception suggest that Engineer A's silence about the nature of his findings - simply allowing termination to occur without a full discussion of the ethical landscape - may itself constitute a partial ethical failure independent of the subsequent defense retention. Had Engineer A engaged in that pre-termination discussion, two consequences might have followed: first, Attorney Z and the plaintiff would have had the opportunity to provide or withhold consent to any future adverse participation, satisfying the consent-prerequisite mechanism embedded in the Former Client Adversarial Participation Prohibition; and second, Engineer A's own ethical obligations going forward would have been clarified and potentially altered by that disclosure. The absence of this pre-termination discussion left the plaintiff without the ability to exercise the consent mechanism that the Code implicitly preserves, and it left Engineer A without the moral clarity that such a discussion would have provided. This omission, while not the primary violation identified by the Board, reinforces the conclusion that Engineer A's conduct across the entire sequence of events - from initial termination through defense retention - reflected a systemic failure to engage with his ethical obligations as a forensic expert in an adversarial proceeding.

Regarding Q201: The Forensic Expert Non-Advocate Objectivity principle and the Switching Sides Prohibition do not genuinely conflict - they operate on different analytical planes - but their interaction creates a paradox that must be explicitly resolved. Engineer A's demonstrated objectivity in refusing to produce a favorable but inaccurate plaintiff report is precisely the quality that makes him attractive to the defense, yet that same objectivity cannot cure the structural conflict created by accepting the defense engagement. The resolution of this apparent tension lies in recognizing that objectivity is a necessary but not sufficient condition for ethical forensic engagement. Objectivity governs the quality and integrity of the work product; the switching-sides prohibition governs the structural permissibility of the engagement itself. An engineer can be perfectly objective and still be ethically barred from an engagement because of the relational and confidentiality obligations that pre-exist the question of report quality. Engineer A's objectivity is not irrelevant - it is what makes him a credible forensic expert - but it cannot serve as a waiver of structural ethical constraints that exist independently of report quality.

The most significant principle tension in this case - between the Forensic Expert Non-Advocate Objectivity principle and the Switching Sides Prohibition - was resolved decisively in favor of the structural prohibition, and that resolution carries an important lesson: objectivity is a necessary but not sufficient condition for ethical forensic participation. Engineer A correctly applied the objectivity principle in the initial engagement by refusing to produce a favorable but inaccurate plaintiff report. That same objectivity made him attractive to the defense. But the Board's conclusion makes clear that genuine technical independence cannot cure a structural conflict of interest arising from prior same-matter confidential engagement. The two principles do not cancel each other out; rather, they operate on different planes. Objectivity governs the quality and honesty of the expert's analysis; the switching sides prohibition governs the structural permissibility of the engagement itself. An engineer can be perfectly objective and still be ethically barred from participating. This case teaches that structural conflict rules function as threshold gatekeeping conditions that precede and override merit-based considerations such as the expert's demonstrated impartiality.

This case establishes a hierarchy among competing forensic engineering principles in which structural conflict prohibitions rank above both disclosure mechanisms and objectivity affirmations. Three principles that might individually seem to mitigate or cure the ethical problem - Engineer A's demonstrated objectivity, his pledge to produce an independent report, and the fact that his engagement was formally terminated before the defense retention - are each independently insufficient to override the switching sides prohibition and the former client adversarial participation prohibition. The case thereby teaches that in the forensic engineering context, the ethical framework treats certain structural conflicts as non-waivable by the engineer's own conduct or representations. Only the former client's consent - a condition entirely outside Engineer A's control and conspicuously absent here - could theoretically lift the bar. This consent-prerequisite mechanism reveals that the prohibition is not truly absolute in a metaphysical sense but is absolute from the engineer's unilateral perspective: Engineer A cannot cure the conflict through any action of his own. The principle prioritization that emerges is: (1) former client consent prerequisite as the threshold condition; (2) structural conflict prohibition as the operative bar absent that consent; (3) objectivity and disclosure as relevant but subordinate considerations that cannot substitute for consent. This hierarchy has significant implications for how forensic engineers must screen engagements before acceptance rather than attempting to manage conflicts after the fact.

The Board's conclusion is further deepened by examining the motivational structure of Attorney X's retention of Engineer A. Attorney X did not seek Engineer A because of his general forensic expertise or reputation in the field; he sought Engineer A precisely because he had learned of the circumstances of Engineer A's termination - specifically, that Engineer A's analysis pointed to plaintiff fault. This means Attorney X's retention was motivated by the desire to exploit Engineer A's prior confidential access and adverse findings, not merely to obtain an objective expert. Engineer A bore an independent ethical obligation to recognize this motivated retention as itself ethically problematic and to decline the engagement on that basis alone, separate from and in addition to the switching-sides prohibition. By accepting the retention without apparent scrutiny of Attorney X's motivations, Engineer A failed to exercise the pre-acceptance conflict screening that the NSPE Code and relevant BER precedents require. This failure compounds the primary violation: not only did Engineer A switch sides in an active proceeding, but he did so in a context where the very reason for his retention was his insider status - making the conflict not incidental but central to the engagement's purpose.

Regarding Q202 and Q204: The apparent conflict between the Confidentiality Duration Indeterminacy principle and the Absolute Loyalty Prohibition Boundary acknowledgment is resolved by recognizing that these principles operate at different levels of obligation intensity. Engineer A is not bound by absolute loyalty to the plaintiff - he correctly refused to produce a false favorable report - but he is bound by a perpetual confidentiality obligation and a proceeding-duration structural conflict prohibition. The Absolute Loyalty Prohibition Boundary acknowledges that Engineer A need not be the plaintiff's champion, but it does not license him to become the plaintiff's adversary in the same proceeding using knowledge gained in confidence. Similarly, the Former Client Adversarial Participation Prohibition's consent-prerequisite mechanism, as raised in Q204, does not render the prohibition merely consent-dependent in a way that undermines its force. Rather, the consent mechanism acknowledges that the prohibition exists to protect the former client's interests, and that the former client - as the party whose interests are at stake - has the authority to waive that protection. The absence of plaintiff consent in this case is therefore not a procedural technicality but a substantive indicator that the structural conflict remains live and unresolved.

The Confidentiality Duration Indeterminacy principle and the Absolute Loyalty Prohibition Boundary principle exist in apparent tension but are reconciled in this case by recognizing that they operate on different axes of obligation. The Board acknowledges that Engineer A is not bound by absolute loyalty to the plaintiff - he was not required to suppress his findings or produce a false report. That boundary correctly limits the loyalty principle to prevent it from becoming a tool of corruption. However, the confidentiality obligation is categorically different: it persists indefinitely post-termination and is not diminished by the fact that Engineer A's findings happened to be adverse to the plaintiff. The reconciliation principle this case establishes is that the termination of a loyalty obligation (Engineer A need not advocate for the plaintiff) does not simultaneously terminate the confidentiality obligation (Engineer A may not deploy plaintiff case knowledge in an adverse engagement). These two obligations have different durations and different triggers. Loyalty ends when the engagement ends; confidentiality does not. Engineer A's acceptance of the defense retention conflated these two distinct obligations, treating the end of loyalty as though it also ended confidentiality, which the Board implicitly rejects.

Beyond the Board's finding that Engineer A's agreement to provide a separate defense-side report was unethical, the structural nature of the conflict reveals that no procedural remedy - including Engineer A's pledge to produce an independent report, his formal termination by Attorney Z, or his full payment of fees - could dissolve the ethical bar created by his prior confidential plaintiff-side engagement. The conflict is not merely procedural or remediable by disclosure; it is substantive and structural. Engineer A obtained confidential case strategy, analysis, and factual framing from the plaintiff's attorney during the initial engagement. That information cannot be mentally segregated from any subsequent analysis he might conduct, regardless of his stated intent. The framing of the defense report as 'separate' and 'independent' does not alter the underlying reality that Engineer A's analytical starting point, his knowledge of the plaintiff's vulnerabilities, and his awareness of the case's evidentiary landscape were all shaped by confidential access obtained in a fiduciary-adjacent capacity. The Board's conclusion therefore rests not merely on a rule against switching sides, but on the deeper recognition that the integrity of the adversarial proceeding itself is compromised when a forensic expert carries insider knowledge across party lines in an active matter.

The most significant principle tension in this case - between the Forensic Expert Non-Advocate Objectivity principle and the Switching Sides Prohibition - was resolved decisively in favor of the structural prohibition, and that resolution carries an important lesson: objectivity is a necessary but not sufficient condition for ethical forensic participation. Engineer A correctly applied the objectivity principle in the initial engagement by refusing to produce a favorable but inaccurate plaintiff report. That same objectivity made him attractive to the defense. But the Board's conclusion makes clear that genuine technical independence cannot cure a structural conflict of interest arising from prior same-matter confidential engagement. The two principles do not cancel each other out; rather, they operate on different planes. Objectivity governs the quality and honesty of the expert's analysis; the switching sides prohibition governs the structural permissibility of the engagement itself. An engineer can be perfectly objective and still be ethically barred from participating. This case teaches that structural conflict rules function as threshold gatekeeping conditions that precede and override merit-based considerations such as the expert's demonstrated impartiality.

This case establishes a hierarchy among competing forensic engineering principles in which structural conflict prohibitions rank above both disclosure mechanisms and objectivity affirmations. Three principles that might individually seem to mitigate or cure the ethical problem - Engineer A's demonstrated objectivity, his pledge to produce an independent report, and the fact that his engagement was formally terminated before the defense retention - are each independently insufficient to override the switching sides prohibition and the former client adversarial participation prohibition. The case thereby teaches that in the forensic engineering context, the ethical framework treats certain structural conflicts as non-waivable by the engineer's own conduct or representations. Only the former client's consent - a condition entirely outside Engineer A's control and conspicuously absent here - could theoretically lift the bar. This consent-prerequisite mechanism reveals that the prohibition is not truly absolute in a metaphysical sense but is absolute from the engineer's unilateral perspective: Engineer A cannot cure the conflict through any action of his own. The principle prioritization that emerges is: (1) former client consent prerequisite as the threshold condition; (2) structural conflict prohibition as the operative bar absent that consent; (3) objectivity and disclosure as relevant but subordinate considerations that cannot substitute for consent. This hierarchy has significant implications for how forensic engineers must screen engagements before acceptance rather than attempting to manage conflicts after the fact.

Regarding Q202 and Q204: The apparent conflict between the Confidentiality Duration Indeterminacy principle and the Absolute Loyalty Prohibition Boundary acknowledgment is resolved by recognizing that these principles operate at different levels of obligation intensity. Engineer A is not bound by absolute loyalty to the plaintiff - he correctly refused to produce a false favorable report - but he is bound by a perpetual confidentiality obligation and a proceeding-duration structural conflict prohibition. The Absolute Loyalty Prohibition Boundary acknowledges that Engineer A need not be the plaintiff's champion, but it does not license him to become the plaintiff's adversary in the same proceeding using knowledge gained in confidence. Similarly, the Former Client Adversarial Participation Prohibition's consent-prerequisite mechanism, as raised in Q204, does not render the prohibition merely consent-dependent in a way that undermines its force. Rather, the consent mechanism acknowledges that the prohibition exists to protect the former client's interests, and that the former client - as the party whose interests are at stake - has the authority to waive that protection. The absence of plaintiff consent in this case is therefore not a procedural technicality but a substantive indicator that the structural conflict remains live and unresolved.

The Confidentiality Duration Indeterminacy principle and the Absolute Loyalty Prohibition Boundary principle exist in apparent tension but are reconciled in this case by recognizing that they operate on different axes of obligation. The Board acknowledges that Engineer A is not bound by absolute loyalty to the plaintiff - he was not required to suppress his findings or produce a false report. That boundary correctly limits the loyalty principle to prevent it from becoming a tool of corruption. However, the confidentiality obligation is categorically different: it persists indefinitely post-termination and is not diminished by the fact that Engineer A's findings happened to be adverse to the plaintiff. The reconciliation principle this case establishes is that the termination of a loyalty obligation (Engineer A need not advocate for the plaintiff) does not simultaneously terminate the confidentiality obligation (Engineer A may not deploy plaintiff case knowledge in an adverse engagement). These two obligations have different durations and different triggers. Loyalty ends when the engagement ends; confidentiality does not. Engineer A's acceptance of the defense retention conflated these two distinct obligations, treating the end of loyalty as though it also ended confidentiality, which the Board implicitly rejects.

This case establishes a hierarchy among competing forensic engineering principles in which structural conflict prohibitions rank above both disclosure mechanisms and objectivity affirmations. Three principles that might individually seem to mitigate or cure the ethical problem - Engineer A's demonstrated objectivity, his pledge to produce an independent report, and the fact that his engagement was formally terminated before the defense retention - are each independently insufficient to override the switching sides prohibition and the former client adversarial participation prohibition. The case thereby teaches that in the forensic engineering context, the ethical framework treats certain structural conflicts as non-waivable by the engineer's own conduct or representations. Only the former client's consent - a condition entirely outside Engineer A's control and conspicuously absent here - could theoretically lift the bar. This consent-prerequisite mechanism reveals that the prohibition is not truly absolute in a metaphysical sense but is absolute from the engineer's unilateral perspective: Engineer A cannot cure the conflict through any action of his own. The principle prioritization that emerges is: (1) former client consent prerequisite as the threshold condition; (2) structural conflict prohibition as the operative bar absent that consent; (3) objectivity and disclosure as relevant but subordinate considerations that cannot substitute for consent. This hierarchy has significant implications for how forensic engineers must screen engagements before acceptance rather than attempting to manage conflicts after the fact.

Regarding Q301 and Q304: From a deontological perspective, Engineer A violated two analytically distinct categorical duties. First, he violated a duty of structural loyalty - not absolute advocacy loyalty, but the duty not to become an instrument of adversarial action against a former client in the same matter in which confidential trust was extended. This duty is categorical in the sense that it does not yield to consequentialist calculations about the quality or independence of the resulting report. Second, and independently, Engineer A violated a perpetual duty of confidentiality that attaches to all information transmitted by the plaintiff through Attorney Z during the engagement. This duty persists beyond termination as a matter of categorical obligation under Code Section II.1.c., and any post-termination adverse participation in the same matter constitutes a per se breach of that duty regardless of Engineer A's intent to keep the report independent. The deontological analysis thus yields two independent grounds for finding Engineer A's conduct unethical, each sufficient on its own, and their conjunction makes the violation particularly clear.

Regarding Q302: From a consequentialist perspective, the harms generated by Engineer A's acceptance of the defense retention substantially outweigh any benefit derived from his ostensibly independent and objective report. The harms include: (1) structural contamination of the adversarial proceeding's integrity, because the defense gains access to an expert whose analytical conclusions were shaped in part by confidential plaintiff information; (2) direct harm to the plaintiff's litigation position, because the circumstances of Engineer A's termination - now known to opposing counsel - effectively signal to the defense the weaknesses in the plaintiff's case; (3) systemic harm to the institution of forensic engineering, because permitting switching-sides conduct incentivizes retaining attorneys to terminate unhelpful experts strategically in order to make them available to the opposition; and (4) erosion of client trust in forensic expert engagements generally, as clients cannot safely share confidential information with experts if termination of the engagement removes all structural protections. The benefit - an additional independent technical analysis - is marginal, because the defense could retain any number of other qualified forensic engineers without these structural harms. The consequentialist calculus therefore strongly supports the Board's conclusion.

Regarding Q303: From a virtue ethics perspective, Engineer A failed to demonstrate the professional integrity and honesty expected of a forensic engineer when he accepted the defense retention. A forensic engineer of genuine integrity would have recognized that Attorney X's motivation for retaining him was not his general expertise but his specific prior access to the plaintiff's confidential case analysis, and would have understood that accepting such a retention - regardless of the quality of the resulting work - would compromise the character of his professional practice. Virtue ethics asks not merely whether the act was permissible but whether it reflects the character of a person of professional integrity. Engineer A's initial refusal to produce a favorable but inaccurate plaintiff report demonstrated exactly the kind of integrity the forensic engineering role demands. His subsequent acceptance of the defense retention, knowing the basis for Attorney X's interest, represents a failure to sustain that integrity through the full arc of the engagement. The virtuous forensic engineer would have declined the defense retention and, if appropriate, disclosed to Attorney X the ethical reasons for that declination.

Regarding Q301 and Q304: From a deontological perspective, Engineer A violated two analytically distinct categorical duties. First, he violated a duty of structural loyalty - not absolute advocacy loyalty, but the duty not to become an instrument of adversarial action against a former client in the same matter in which confidential trust was extended. This duty is categorical in the sense that it does not yield to consequentialist calculations about the quality or independence of the resulting report. Second, and independently, Engineer A violated a perpetual duty of confidentiality that attaches to all information transmitted by the plaintiff through Attorney Z during the engagement. This duty persists beyond termination as a matter of categorical obligation under Code Section II.1.c., and any post-termination adverse participation in the same matter constitutes a per se breach of that duty regardless of Engineer A's intent to keep the report independent. The deontological analysis thus yields two independent grounds for finding Engineer A's conduct unethical, each sufficient on its own, and their conjunction makes the violation particularly clear.

Regarding Q104: The switching-sides prohibition does not extend indefinitely to all future matters in which Engineer A previously held a confidential plaintiff-side engagement, but it does persist for the duration of the same proceeding and likely for any matter in which the confidential information obtained remains materially relevant. Had the personal injury case been fully concluded and closed before Attorney X approached Engineer A, the ethical calculus would shift significantly, though it would not automatically become permissible. The Unrelated Matter Permissibility Boundary constraint establishes that Engineer A's prohibition is keyed to the same-matter identity of the proceeding. However, even in a concluded matter, the post-termination confidentiality obligation under Code Section II.1.c. would continue to bar Engineer A from deploying plaintiff confidential information in any subsequent context. The distinction is that in a concluded matter, there is no ongoing adversarial proceeding to contaminate, no active plaintiff position to undermine, and no structural conflict of divided loyalty - but the confidentiality duty itself survives. Thus, the prohibition has two analytically distinct components: the switching-sides bar, which is proceeding-duration-limited, and the confidentiality perpetuation obligation, which is indefinite.

Regarding Q401: Engineer A's acceptance of the defense retention would have been significantly more defensible - though not automatically permissible - if the personal injury case had been fully resolved and closed before Attorney X approached him. In a concluded matter, the proceeding-duration loyalty floor and the same-matter adversarial conflict prohibition would no longer be operative, because there is no ongoing proceeding to contaminate and no active plaintiff position to undermine through structural conflict. However, two residual ethical constraints would remain. First, the perpetual confidentiality obligation under Code Section II.1.c. would continue to bar Engineer A from deploying or relying upon plaintiff confidential information in any subsequent engagement. Second, Engineer A would need to assess whether the subject matter of any new engagement was sufficiently distinct from the concluded matter that his prior confidential knowledge would not materially influence his new analysis. If those conditions could be satisfied - if the matter were truly concluded and Engineer A could genuinely produce an analysis independent of his prior confidential knowledge - then the engagement might be permissible. The critical distinction is that the switching-sides prohibition is proceeding-duration-specific, while the confidentiality obligation is indefinite.

Regarding Q402: Engineer A's proactive disclosure of his prior plaintiff-side engagement to Attorney X before agreeing to the defense retention would have been ethically required as a matter of conflict screening, but it would not have cured the underlying ethical violation. The Pre-Acceptance Conflict Screening obligation required Engineer A to identify and disclose the conflict before accepting the retention, and his failure to do so constitutes a distinct procedural ethical lapse. However, even if Engineer A had fully disclosed his prior engagement and Attorney X had proceeded with full knowledge of that conflict, the structural bar to the engagement would remain. The switching-sides prohibition and the former client consent prerequisite are not satisfied by defense attorney knowledge of the conflict - they require the consent of the former client, the plaintiff, whose interests are at stake. Attorney X's informed acceptance of the conflict does not substitute for plaintiff consent, because the plaintiff is the party whose confidential information is at risk and whose litigation position is adversely affected. Disclosure to the retaining attorney is a necessary but not sufficient condition for resolving the conflict.

Regarding Q404: If Attorney X had sought to retain Engineer A for a completely unrelated personal injury case involving different parties and facts, rather than the same proceeding in which he had reviewed confidential plaintiff information, the ethical outcome would differ substantially. The switching-sides prohibition and the same-matter adversarial conflict bar are keyed to the identity of the proceeding and the parties involved. In an unrelated matter, there would be no structural conflict of divided loyalty, no ongoing adversarial proceeding to contaminate, and no former client whose active litigation position would be undermined. The Unrelated Matter Permissibility Boundary constraint confirms this distinction. However, even in an unrelated matter, Engineer A would retain a residual obligation to ensure that no confidential information obtained during the plaintiff-side engagement in the original case was material to or deployable in the new engagement. If the new matter were factually and legally distinct such that the prior confidential knowledge had no bearing on the new analysis, the engagement would be permissible. The ethical bar is thus matter-specific and party-specific, not a general prohibition on Engineer A serving defense clients in any personal injury case.

Regarding Q403: If Engineer A had raised the ethical conflict with Attorney Z before his services were terminated - specifically disclosing that his findings were adverse to the plaintiff and discussing the implications - this pre-termination disclosure would have altered his subsequent ethical obligations in meaningful but not dispositive ways. Such disclosure would have fulfilled the Switching Sides Full Discussion With Original Client Obligation, which the Board identified as violated. It would also have given Attorney Z the opportunity to explicitly invoke confidentiality protections, to document the scope of confidential information shared, and potentially to seek protective measures against subsequent adverse use of that information. However, pre-termination disclosure would not have eliminated the switching-sides prohibition or the former client consent prerequisite for subsequent defense engagement. What it would have done is place Engineer A in a cleaner ethical posture: having fulfilled his disclosure obligations to the original client, he would then face the remaining question of whether plaintiff consent had been obtained for defense engagement - and absent such consent, the defense engagement would remain impermissible. The pre-termination disclosure failure thus compounds the switching-sides violation but does not constitute its sole basis.