Post-Acquisition Cultural Integration at a Fortune 50 Petroleum Refiner

Situation

A Fortune 50 petroleum refining and logistics company closed a multi-billion-dollar acquisition that nearly doubled its refining footprint and made it the #1 US refiner by capacity. Two legacy operating cultures, two operating models, and a concurrent enterprise SAP S/4HANA implementation had to converge across finance, HR, capital asset management, operations, and logistics. The deal thesis projected annual run-rate synergies in the billion-dollar range. Cultural drift in the first 24 months would dissolve that thesis.

Task

Tim directed the post-acquisition transformation program. Scope: design the future-state operating model, build the transformation team as a deliberate blend of legacy talent to carry representation and design legitimacy from both sides of the deal, and architect the change journey from kickoff through post go-live stabilization and adoption.

Action

Tim aligned 200+ leaders from two legacy cultures into a single operating team across a multi-year SAP S/4HANA-enabled integration, against typical M&A integration outcomes where roughly half of deals destroy value or miss synergy targets, by anchoring three moves: a blended transformation team drawn from both legacy organizations to legitimize design choices in both populations; a three-day immersive executive workshop that brought both leadership teams into the same room to work through differences live and align on future-state operating decisions; and a sustained change architecture that set cultural initial conditions at kickoff and adjusted them through post go-live adoption. The work applied Deloitte’s Business Transformation Methodology, D3 Organization Design framework, ChangeScout adoption analytics, and PROSCI ADKAR change discipline against SAP Activate/RISE delivery methodology.

Result

A unified operating team. Acquisition synergy capture protected through the integration window. The transformation model became the company’s institutional standard for all future acquisitions, codifying the playbook for subsequent deal integration.

Methods & Tools: Deloitte ChangeScout · Deloitte D3 Organization Design · Deloitte Business Transformation · PROSCI ADKAR · SAP S/4HANA RISE · SAP Activate