Post Merger Integration Consulting for Private Equity
The Integration Partner Built for Private Equity
Private equity moves fast. Closing a deal is just the beginning — the real value is created (or destroyed) in the months that follow. Stonehill is a post merger integration consulting firm built specifically to help PE sponsors and their portfolio companies execute integrations that are structured, efficient, and designed to hit financial targets.
We've worked alongside PE-backed companies across the country, leading integrations across operations, people, technology, finance, and customer experience. We don't just advise — we embed, execute, and deliver.
Why PE Firms Choose Stonehill
Integration isn't a side task — it's the deal. Poorly executed integrations erode EBITDA, spike attrition, and delay value creation by 12–18 months. PE sponsors need an integration partner who moves at the speed of a deal, not the pace of a traditional consulting engagement.
Stonehill was purpose-built for this environment. Our team brings together operational leaders, functional experts, and project management professionals who are accountable to outcomes — not billable hours.
“The difference between a successful acquisition and a failed one often comes down to the 90 days after close. Stonehill exists to make sure our clients win those 90 days.”
Our Post Merger Integration Services for PE
Integration Strategy & Planning
Before Day 1 arrives, we help PE sponsors define the integration thesis, align on the operating model, and build a master integration plan across all workstreams. We establish the governance structure, identify risks, and assign clear accountability so that nothing falls through the cracks.
Day 1 Readiness
Day 1 sets the tone for the entire integration. Stonehill prepares your team for a seamless transition — communications, HR actions, IT access, customer-facing changes, and leadership alignment. We ensure employees and customers experience confidence from the very first day under new ownership.
100-Day Integration Execution
We lead the integration management office (IMO), track progress against milestones, surface blockers, and keep stakeholders aligned. Our team works inside your organization — not as external advisors, but as embedded execution partners driving results every week.
Synergy Identification & Realization
We help PE sponsors identify, model, and capture cost and revenue synergies — then build the roadmap to realize them. Our team tracks synergy attainment against deal thesis assumptions and adjusts the plan as the business evolves.
People & Culture Integration
Talent attrition is one of the top integration failure points. We lead change management, organizational design, and cultural alignment programs that reduce uncertainty, retain key talent, and build a unified team.
Technology & Systems Integration
We assess the technology landscape of both organizations, recommend integration or consolidation paths, and manage the execution. Whether it's ERP consolidation, CRM migration, or infrastructure standardization, we manage the complexity so your team doesn't have to.
What Makes Stonehill Different
• PE-native approach: We understand deal timelines, hold period pressures, and EBITDA accountability
• Embedded execution model: Our team works inside your portfolio company, not from a distance
• Cross-functional expertise: One firm covering all integration workstreams — strategy, ops, people, tech, and marketing
• Nationally recognized: Award-winning consultancy with clients including Fortune 500 and PE-backed companies
• Boutique speed, enterprise rigor: The responsiveness of a boutique firm with the methodology of a top-tier consultancy
Frequently Asked Questions
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Ideally, before the deal closes. Early engagement allows us to begin integration planning during due diligence, complete pre-close workstream preparation, and be ready to execute on Day 1. That said, we also frequently step in post-close to help stabilize and accelerate integrations that are already underway.
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Both. We operate at the intersection of sponsor and portfolio company, aligning both parties on the integration thesis and execution plan. We communicate transparently with both levels of the organization.
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Most engagements run 90–180 days depending on deal complexity. We offer both full IMO leadership engagements and targeted functional support, depending on where your team needs the most help.
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