Post-Merger Integration: Combining Two Professional Services Firms into a Single Operating Model

A private equity sponsor had completed the acquisition of two complementary professional services firms with combined revenues of approximately £85 million and 620 fee-earners across the UK. The deal thesis required £6.2 million of run-rate cost synergies and a unified go-to-market within 12 months of completion. Each firm operated on different practice management, time-and-billing, document management and finance platforms, with overlapping leadership, inconsistent client onboarding processes and no shared data taxonomy. Partner sentiment was sensitive, with retention of key fee-earners critical to the investment case. Previous attempts at light-touch integration in the sector had repeatedly destroyed value through delayed decisions, parallel cultures and prolonged technology indecision. The sponsor needed a deliberate, time-boxed integration that protected revenue, captured the planned synergies and produced a single operating model that could scale through further bolt-on acquisitions.

Intology was engaged as Integration Director on behalf of the sponsor, working alongside the newly appointed Group CEO. We established a single Integration Management Office with clear workstream leadership across operating model, technology, finance, people and clients. A target operating model was designed and approved within 60 days, anchored on a single practice management and time-and-billing platform selected through a structured 90-day evaluation. Finance was consolidated onto a single chart of accounts with a unified month-end calendar by quarter two. Client onboarding was redesigned around a single intake process and conflict checking workflow, removing duplicate effort across the combined firm. A partner retention plan was developed with the sponsor, including transparent role mapping, equity treatment and a clear leadership succession framework. Synergy tracking was built into monthly board reporting from day one, with each saving line owned and evidenced rather than reported in aggregate.