A successful acquisition does not end when the transaction closes. The real work begins when two organizations have to operate as one while continuing to serve customers, retain key employees, maintain business performance, and deliver the value that justified the deal. Stonehill is a leading M&A integration consulting firm in the United States helping private equity firms, corporate acquirers, and executive teams turn transaction strategy into coordinated, measurable execution.

Integration is where the assumptions behind a deal meet the realities of the business. Systems may not align, processes may differ, leadership teams may have competing priorities, and employees may be uncertain about what comes next. At the same time, the organization still has to run the business. Stonehill works alongside leadership teams to bring structure to that complexity, establishing the governance, accountability, workstreams, and decision-making needed to keep the integration moving without losing sight of the underlying value creation thesis.

Our approach extends beyond creating an integration plan. Stonehill can support the full integration lifecycle, from pre-close planning and Day One readiness through the first 100 days, synergy execution, and the transition to steady-state operations. Depending on the transaction, we can lead the Integration Management Office, coordinate functional workstreams, manage dependencies, establish executive reporting, and help leadership make the decisions that keep the integration on track.

M&A integration services can include:

• Integration strategy and pre-close planning

• Day One readiness and execution

• Integration Management Office (IMO) leadership

• 100-day integration planning and execution

• Synergy identification, tracking, and value realization

• Organizational and operating model integration

• Finance, operations, commercial, HR, and technology integration

• Change management and employee communications

• Post-integration optimization

A strong Integration Management Office provides the structure that connects these workstreams. Stonehill helps establish clear ownership, decision rights, meeting cadence, escalation paths, milestones, and reporting so executives have visibility into what is happening across the integration. This matters because integration is not simply a collection of functional projects. Dependencies between finance, operations, technology, people, commercial teams, and other functions can determine whether a seemingly straightforward initiative succeeds or stalls.

Stonehill also connects integration execution to organizational design and operating model decisions. Combining two companies often requires more than putting employees into new reporting structures. Leadership teams may need to determine which processes should be standardized, where decision-making should sit, how responsibilities should be divided, and what the future organization needs to look like. Addressing those questions early can help the combined company move toward a sustainable operating model rather than maintaining temporary integration workarounds indefinitely.

Technology is another critical component of many integrations. Acquirers may need to consolidate applications, migrate data, address cybersecurity gaps, integrate infrastructure, or determine which systems should become the future-state platform. Stonehill's Technology, Analytics & AI capabilities can support these decisions while keeping technology integration connected to business priorities rather than treating it as an isolated IT exercise. Stonehill also provides technology due diligence to help leadership teams understand technology risks and value-creation opportunities before or during a transaction.

The people side of integration deserves the same level of discipline. Employees from both organizations need clarity around leadership, roles, responsibilities, processes, and expectations. Customers and other stakeholders may also need communication as the organizations transition. Stonehill incorporates change and project management into integration execution to help organizations manage the human and operational impact of the transaction while maintaining momentum.

Project management discipline is particularly important when multiple integration workstreams are moving simultaneously. The Project Management Institute has highlighted the value of treating M&A integration as a structured project with clear leadership, measurable objectives, dependencies, milestones, and active participation from both organizations. Stonehill applies that same execution mindset while tailoring the integration structure to the transaction, the organizations involved, and the value the deal is expected to create.

For private equity firms and operating partners, integration often needs to move quickly while protecting the performance of the platform business. Stonehill supports private equity M&A integration as well as bolt-on acquisitions, platform integrations, carve-outs, and more complex transactions. For corporate and strategic acquirers, the challenge may be building a repeatable integration capability that allows the organization to execute multiple acquisitions without reinventing the process every time. Stonehill can help establish the playbooks, governance, reporting, and integration capabilities needed to make M&A a more scalable growth strategy.

Stonehill's broader Acquisition Integration practice brings together post-merger integration, synergy optimization, and technology due diligence. The firm's work is designed to connect strategy with execution rather than separating transaction strategy from what happens after close. That distinction matters because the value of an acquisition ultimately depends on whether the combined organization can operate effectively and deliver against the objectives established during the deal.

Organizations do not need another integration plan that sits on a shelf. They need experienced people who can help leadership make decisions, coordinate teams, resolve issues, track value, and keep the business moving. Stonehill works as an extension of the leadership team, bringing senior-level strategy, program management, organizational, operational, and technology expertise into the integration.

As a leading M&A integration consulting firm in the United States, Stonehill helps organizations move from transaction close to operational alignment and measurable value creation. Whether the need is pre-close integration planning, IMO leadership, Day One execution, synergy realization, organizational integration, technology integration, or post-integration optimization, Stonehill provides the structure and hands-on execution support needed to make the deal work in practice.