Due diligence on an environmental consulting firm

Due diligence on an environmental consulting firm is largely about surfacing risk that will not show up in a set of financial statements: liability sitting in reports the firm issued years ago, referral relationships that could redirect after closing, and staff credentials the business depends on that do not transfer with the sale. The work under a signed letter of intent is converting what the seller has told you into records and confirmations you can actually verify before your conditions expire.

The historical sign-off review is the work that matters most

Request a complete list of assessment and remediation reports issued over a meaningful look-back period, and flag any that generated a client dispute, a follow-up finding of contamination the original report did not identify, or an insurance notification. A finding here is not automatically a deal-killer, but it changes how the deal should be structured — through price, an indemnity, a holdback, or in some cases walking away — and it is far better to find it now than to inherit it silently through a share purchase you did not structure around it.

Verifying referral concentration, not just hearing about it

Ask for revenue broken out by referral source over at least the past two to three years, and look at how concentrated it actually is among a handful of law firms or lenders. A seller’s description of "strong referral relationships" means little without the underlying numbers, and where practical, a direct conversation between you and the largest referral sources, arranged through the seller, is worth more than any document — it tells you whether those relationships are personal to the seller or genuinely transferable to you.

Confirming qualified-staff credentials and retention

Confirm directly with the relevant provincial regulator that the firm’s qualified engineers, geoscientists or other credentialed staff are in good standing, and get retention commitments from anyone whose sign-off authority the firm’s revenue depends on in writing rather than as a verbal assurance. Where the firm operates across provinces, check standing separately in each one, since qualified-person requirements for regulated filings — such as a record of site condition — are set independently by each provincial environmental ministry.

Checking whether past sites reached regulatory closure

Where the firm’s past work involved a site with identified contamination, find out whether that file actually reached formal regulatory closure or whether it is still technically open. Some provinces issue a specific closure document once a contaminated site meets the applicable standard and the file is closed out — Alberta, for example, issues a Remediation Certificate through its environmental ministry — and a project that reached that kind of closure carries materially less ongoing liability than one where remediation was recommended but never formally signed off by the regulator. Ask the seller directly, project by project, which files remain open, and treat an open file with an old date on it as a live liability question rather than settled history, since the passage of time on its own does not close a regulatory file.

The firm’s own regulatory compliance history

Beyond the reports the firm issues about other people’s sites, check the firm’s own compliance history at its own facilities — sample storage, waste handling and any environmental approvals the firm itself holds for its lab or operations. An unresolved compliance issue here is a more immediate and controllable risk than historical sign-off liability, but it is a real one, and buyers sometimes overlook it because attention is naturally drawn to the more dramatic risk of past client-site findings.

What a finding actually changes in the deal

A liability concern uncovered during diligence rarely has to be a dealbreaker on its own — it more often changes how the purchase price is structured. A referral relationship that looks shakier than represented, an open remediation file, or an unresolved client dispute commonly gets addressed through a holdback of part of the purchase price, released once the uncertainty actually resolves, or through a specific indemnity naming the issue directly rather than relying on a general warranty to cover it. Employment diligence matters alongside this — confirm that retention terms for the qualified staff and referral-facing consultants the pipeline depends on are actually documented, not assumed, since a verbal understanding with the seller does not survive a change of ownership on its own.

Corporate, lien and equipment-agreement searches

Run a corporate search on the firm and a lien and execution search against both the corporation and its principals to confirm there are no undisclosed claims against the business. Separately, confirm which lab-partner and equipment arrangements are owned outright versus which require a third party’s consent to assign, since a lab relationship that does not survive the sale can slow turnaround on the exact real estate-triggered work that depends on speed.