A cyber insurance carrier reviewing a seven- or eight-figure claim, a breach coach preparing for a DPA technical review, or panel counsel testing an IR narrative before deposition is buying something specific: an independent technical reconstruction that will survive challenge in a venue the original report was not written for.
The market for that work is narrower than it appears. Most firms positioned to provide a second opinion are structurally compromised — by EDR sales, live IR practice, or carrier retainer relationships. The evaluation questions below are how to separate genuine independence from the marketing version.
Question One: What Does the Firm Sell Besides the Opinion?
A second-opinion review is only as durable as the conflicts it does not carry. If the reviewing firm sells endpoint tooling, the review will not credibly critique an EDR’s detection gaps. If the firm runs a live IR practice, the review will not credibly critique IR methodology — those are its own clients next quarter. If the firm sits on the carrier’s retainer panel, the review carries an implicit relationship pressure even when none is exercised.
The correct question is not “are you independent?” Every firm answers yes. The correct question is structural: what revenue lines does the firm operate, and which of them creates a position that a finding could damage? Hexmortem operates one revenue line — forensic engineering — and is engaged precisely because that structure is rare in the market.
Question Two: How Are Findings Bound to Artifacts?
Ask to see a redacted prior deliverable. Read three findings at random. For each, identify: which artifact does this rest on, what methodology was used to derive it from that artifact, and what confidence level is stated.
If a finding reads “the threat actor exfiltrated approximately 50 GB of data,” with no artifact citation and no confidence interval, the document is a narrative. It will not hold under adversarial scrutiny, regardless of who wrote it. If findings are written as “high confidence on volumetric egress reconstructed from netflow record set N-X; medium confidence on content attribution reconstructed from staging archive metadata,” the document is evidentiary.
This is not stylistic preference. It is the difference between a deliverable that survives cross-examination and one that does not.
Question Three: What Is the Position on Gaps?
Every post-incident matter has gaps in the record. Logs rolled, hosts were rebuilt, retention windows expired, EDR telemetry was never collected for a particular subsystem. The question is how the reviewing firm handles those gaps.
A firm that fills gaps with confident-sounding narrative is solving a presentation problem, not an evidentiary one. A firm that discloses gaps explicitly — “the lateral movement path between Host A and Host B cannot be reconstructed from the available artifacts; inference is plausible but not supported at a confidence level appropriate for the venue” — is solving the right problem.
The Independent Second-Opinion Review at Hexmortem is structured around exactly that disclosure discipline. The output identifies what the original report asserted, what the available artifacts support, and where the two diverge.
Question Four: Is the Deliverable Built for the Venue?
A report written for a board update is not the same document as a report written for a DPA technical review, a deposition exhibit, or a reinsurer challenge. The audiences differ in what they will accept as evidence and how they will test the document.
For adversarial venues, the deliverable should be hash-verified, with each finding traceable to its artifact through a documented chain of custody. It should anticipate the technical objections opposing counsel or a regulator’s technical adviser will raise. It should be drafted for the transcript, not the meeting.
Question Five: What Is the Engagement Posture on Subrogation?
If the matter has a subrogation dimension — recovery against an MSP, software vendor, or third-party processor — the second-opinion engagement and the subrogation forensics work are related but not identical. The standards subrogation counsel must prove (causation, breach of duty, damages) are different from the operational standards the original IR report addressed.
A reviewing firm should be able to articulate that distinction before the engagement begins, and scope the work product accordingly.
What the Right Engagement Looks Like
The answers to the five questions above will narrow the field quickly. If the matter is at the stage where the original report is being tested against venues it was not built for, Hexmortem scopes second-opinion engagements with the artifact set, the venue, and the confidence interval requirements defined before any deliverable is committed.