7 Things to Look for in a Post-Merger Integration Consultant

Choosing the wrong integration partner is a quiet way to erode deal value. The wrong PMI consultant shows up with generic templates, junior staff running your workstreams, and a plan that looks impressive in a deck but falls apart the moment real organizational friction hits.

Here's what actually separates a strong PMI consultant from one that will cost you more than it saves.

1. Real Operating Experience, Not Just Theory

Ask who is actually going to run your integration day to day. Frameworks and slide templates are commoditized — every firm has them. What's harder to fake is a track record of having actually directed integration management offices (IMOs), managed carve-outs, and sat across the table from skeptical operating executives who don't care about the framework, only whether the plan works.

2. Senior Talent Doing , Not Just Selling

A common failure mode with larger consultancies: a partner sells the engagement, then a team of junior associates executes it. Ask directly who staffs the engagement day-to-day and whether the people in the sales conversation are the people who show up to run workstream meetings six weeks in.

3. A Structured but Flexible IMO Model

Look for a consultant who can stand up an integration management office quickly — with clear workstream ownership, a synergy tracker, a Day One readiness checklist, and a cadence of governance meetings — but who tailors that structure to your deal rather than dropping in a templated framework that doesn't match your org's complexity or culture.

4. Experience With Your Deal Type Specifically

Integrating a tuck-in acquisition into an existing platform is a very different problem than standing up a standalone carve-out with its own ERP, HR, and finance functions under a TSA. Ask for specific examples relevant to your deal type — not just generic M&A experience.

5. Change Management, Not Just Process Design

The technical side of integration — systems, org charts, reporting lines — is necessary but not sufficient. The deals that actually fail to deliver value usually fail on the human side: talent attrition, culture clashes, unclear communication, and leadership misalignment. A strong PMI consultant treats change management and communications planning as core deliverables, not an afterthought bolted on at the end.

6. Financial Fluency - Synergy Tracking That Holds Up

Your PMI partner should be able to build and maintain real synergy trackers, EBITDA bridges, and BD pipeline models that tie back to the original deal thesis — not just narrative progress updates. If synergies promised in diligence aren't being tracked and reported against actuals, no one will know if the deal is actually delivering until it's too late to course-correct.

7. References From Deals Similar in Size and Complexity

Big-name client logos don't tell you much if those engagements were nothing like yours. Ask for references specifically from PE-backed or founder-led middle-market deals in your size range ($50M–$1B revenue is a common band), and ask those references pointed questions about responsiveness, senior-team involvement, and whether the integration actually hit its milestones.

Why This Checklist Matters More at the Middle Market

Large consultancies are built to serve large enterprise deals, with pricing and staffing models to match. Middle-market, PE-backed, and founder-led companies often get a diluted version of that model — senior partner in the pitch, junior team in the trenches — at premium pricing.

How Stonehill Measures Up

Stonehill was built specifically to close that gap: a boutique strategy and PMI consultancy where senior operators — not layered teams of juniors — lead integration work directly for PE-backed and founder-led middle-market companies. That means:

• Structured IMOs, synergy trackers, and Day One readiness plans tailored to the deal, not templated

• Direct senior involvement across PMI, carve-outs, TSA advisory, organizational design, and change management

• A track record across a range of deal types — platform build-outs, carve-outs, and add-on acquisitions — for companies in the $50M–$1B revenue range

If you're evaluating PMI partners for an upcoming integration, running this checklist against every firm on your list — including Stonehill — is exactly the right instinct.

Evaluating post-merger integration consultants for an upcoming deal? Stonehill would welcome the conversation — and the scrutiny.