The strategic and technical dimensions of M&A integration get most of the planning attention. But across every integration I have led, advised, or evaluated, the organizational dimensions are what determined whether the acquisition actually delivered. Here is what I have learned about the people side of integration.
Communication Is the Dimension That Gets Underestimated Most
In every integration I have been part of, the single largest source of dysfunction was the information vacuum between the announcement and the first visible decisions. Rumors fill that vacuum fast, and they are almost always worse than the reality. I learned to communicate strategy and impact immediately after close, including synergies and workforce implications. People do not need the full plan on day one. They need to know that leadership has a direction, that it will be shared openly, and that they will not be surprised. Silence says “we do not have a plan” whether that is true or not.
Saying something once is not communicating it. This applies to everything: strategy, direction, workforce changes, how the business is measured, what success looks like. I have learned to treat communication during integration as a sustained, repetitive effort. The message needs to be delivered multiple times, in multiple formats, over months before it becomes the shared understanding of the combined organization. The instinct is to communicate a decision, check the box, and move on. The reality is that most people need to hear something several times, from several sources, before it becomes real to them.
Don’t Assume a Shared Language
Do not assume the acquired company shares your language. PE-backed value creation has a specific vocabulary: ARR, net retention, EBITDA targets, hold period milestones, rule of 40. The acquiring company lives in that vocabulary every day. The acquired company may not. They may use different terms for the same concepts, or they may not have the concepts at all. If the acquired company was founder-led, bootstrapped, or backed by a different type of investor, their mental model of how the business is measured and what success looks like may be fundamentally different from yours.
Building shared understanding takes patience and a willingness to educate without condescension. This is not a one-time orientation. It is part of the sustained communication effort that runs across the first six months or longer.
Get Below the Senior Leadership Layer Early
During diligence, senior leaders are usually the only people you get access to. Your understanding of the organization is filtered entirely through their lens. Post-close, if you continue to lead and communicate only through that same layer, you inherit whatever gaps, biases, or blind spots they carry. Formal senior leadership often represents the intended structure of the organization, not the actual operating dynamics.
The real intelligence about who holds influence, where resistance lives, and how decisions actually get made sits one or two levels down. This is also where trust is built or lost. Most acquired employees will not take the new leadership’s word at face value, and you should not expect them to. They look to the people they already trust — their direct supervisors, their long-tenured colleagues, the leaders they have worked with for years — to confirm or interpret what they are hearing from the top. If that layer is not aligned, informed, and reinforcing the same direction, your communication does not land no matter how clear or well intentioned it is.
I learned to focus heavily on this middle layer: making sure direct managers and influential leaders in the acquired organization understood the direction, believed in it enough to reinforce it, and had the context to answer the questions their teams were bringing to them. You cannot lead a transformation through a single layer of intermediaries.
Cultural Understanding Gets the Most Lip Service and the Least Investment
One of the most expensive mistakes in cross-border acquisitions is assuming that titles, roles, and reporting structures mean the same thing in the acquired organization as they do in the acquiring one. In one acquisition I was involved in, diligence characterized the target as a global company based on the presence of a US operation. The reality was that the company operated regionally, with deeply local norms, language preferences, and decision-making patterns. The cultural gap was far wider than anyone anticipated, and it was not fully understood until well into the integration. It took significant time to overcome and had lasting impacts on the combined organization.
That experience is a large part of why I now invest so heavily in understanding culture before assuming I understand the organization. There is no substitute for spending time in the locations, learning how the organization actually operates, and investing in the cultural bridge, whether that means hiring for it or building it yourself.
Make Workforce Decisions with Speed and Honesty
Workforce decisions are part of most acquisitions, and there is no version of that which is easy. What I have learned is that the speed and honesty of how those decisions are communicated determines whether the remaining organization trusts leadership enough to execute through the transition. Delayed workforce decisions do not protect people. They extend uncertainty, and uncertainty is corrosive. Make the hard decisions with clarity and humanity, communicate them directly, and then give the remaining organization a forward-looking narrative that is credible enough to build toward.
Plan for Surprises
Every integration also surfaces things that diligence missed. That is not a failure of diligence. It is the nature of combining two organizations. The question is not whether surprises will appear but whether the plan has enough flexibility to absorb them. The best insurance is not more diligence. It is a leadership team that expects the unexpected, builds margin into the timeline, and has enough organizational trust to adapt quickly when reality diverges from the model.
The acquisition creates the opportunity. The integration determines whether that opportunity becomes returns or regret.