Once a deal closes, someone has to actually combine, or deliberately keep separate, the technology of two organizations that a moment ago operated independently. That work is M&A technology integration, and it's usually the least visible, most underestimated part of realizing a deal's value.
What Has to Get Integrated
Four things typically need a decision: applications (which systems survive, which get retired, which run in parallel for now), infrastructure (networks, data centers, cloud environments), vendor contracts (telecom, software licensing, managed services, often duplicated across both companies), and data (customer records, financial systems, operational data that needs to be accurate and consistent across the combined entity).
The Data Cleanup Problem
Combining two companies' data is rarely as simple as pointing one system at another. Deduplication, standardization, validation, and normalization all have to happen before the combined data can be trusted for decision-making. Skipping or rushing this step is one of the most common ways an otherwise well-run integration produces bad numbers for months afterward.
Sequencing: What Moves First
Not everything integrates at once, and trying to move everything simultaneously is how integrations stall. A workable sequence usually prioritizes what's contractually urgent (a duplicated vendor contract that's actively costing money), what's operationally risky (systems that can't safely run in parallel for long), and what's low-risk and can wait (nice-to-have consolidations that don't affect the business either way in the near term).
Who Should Own the Integration
Integration works best with a single accountable owner and a cross-functional team behind them, not a committee making every decision jointly. IT typically owns the technical execution; Finance owns the contract and cost side; the business units own whether a proposed change actually disrupts how people work day to day. Splitting ownership across all three without a single point of accountability is one of the more common ways an integration that looked straightforward on paper drags on for an extra two quarters.
Frequently Asked Questions
How long does a typical technology integration take? It depends heavily on how entangled the two environments were to begin with, but a meaningful integration commonly runs several months to over a year for the harder categories like ERP or identity systems.
What's the most common mistake? Treating integration as a technical project owned entirely by IT, rather than a cross-functional effort that finance, operations, and the business units all have a stake in.
Should systems run in parallel during the transition? Often yes, temporarily, particularly for anything customer-facing. Running in parallel costs more in the short term but avoids the operational risk of a hard cutover before the new environment is proven.
Where to Go Next
For the acquisition decision this integration follows, see Private Equity Mergers & Acquisitions. For the reverse scenario, separating rather than combining, see IT Carve-Out & Divestiture Separation.
