The deal model assumed synergies. Nobody modelled the cultures.
Two organisations come together, each quietly certain that its own way of working is not a culture at all — it is simply how things are done. Post-merger cultural integration is the work of surfacing that assumption on both sides before it costs you the value you bought. Built for integration leads, HR directors and function heads who have just inherited a combined team.
Book a discovery call See when to bring me inThe org chart merged on Day 1. The two ways of working did not.
Integration plans are built around systems, reporting lines and cost synergies, because those are the things that can be put in a spreadsheet. What cannot be put in a spreadsheet is what each side takes for granted: how a decision gets made, what a deadline means, whether disagreement in a meeting is healthy or insubordinate, how much of the real conversation happens outside the room.
Neither organisation experiences these as choices. They experience them as normal. That is exactly why the resulting cultural friction is so hard to name from the inside — and why it usually gets attributed to individuals, to the acquired entity, or to nothing at all.
- Decisions are agreed in the room and then quietly do not execute afterwards.
- One side’s directness is read as aggression; the other side’s tact is read as evasion.
- Two parallel informal hierarchies operate underneath a single, tidy org chart.
- Quiet attrition in the acquired entity between months 6 and 12, written off as “fit”.
- Meetings where the acquired side gradually stops contributing, and nobody names it.
None of that shows up as a cultural problem in a status report. It shows up as slippage, as attrition, as a synergy case that is running late.
When to bring me in
Post-merger integration is not a single intervention delivered at a single moment. It is a different job at each stage of the deal — and the earlier the entry point, the cheaper the work and the smaller the damage.
Announcement to signing
Before anything is settled
What is happeningNothing is decided, so everyone is reading meaning into every decision. Silence gets interpreted. Early signals set norms that are very hard to reverse later.
What I doA leadership briefing on where the cultural gap actually sits between the two organisations, and communication framing so those first messages do not accidentally establish the wrong norms.
Signing to close
Planning underway, roles unresolved
What is happeningIntegration planning is live, roles are still open, and anxiety is at its peak on both sides. Working habits are being formed right now, by default, without anyone choosing them.
What I doA structured cultural diagnostic of both entities, a friction map broken down by function, and explicit working norms agreed inside the integration team itself before Day 1.
Day 1 to 100
Friction becomes visible
What is happeningThe two ways of working meet daily and the friction stops being theoretical. Managers at the cultural boundary are absorbing it, usually without support or language for it.
What I doCombined-team cross-cultural workshops, shared decision-making and feedback norms built by the team rather than issued to it, and direct manager support at the boundary.
100 days to 18 months
“This is not working and I cannot tell you why”
What is happeningThe integration is formally complete and something is still wrong. Performance, retention or collaboration is off, and the explanations on offer do not fit what people are actually experiencing.
What I doDiagnosis of what set wrong and why, targeted repair where the friction is concentrated, and norms rebuilt with the combined team rather than imposed on it.
In practice, most engagements start at Stage 4. That is simply where the pain becomes undeniable. It is worth saying plainly, though: every one of those engagements would have been shorter, cheaper and less disruptive at Stage 2 — when the norms were still being set rather than unpicked.
Cultural friction, not cultural distance
The useful shift here is an old one. Oded Shenkar proposed cultural friction in 2001 as an alternative to cultural distance — moving away from measuring abstract differences between countries and towards looking at what actually happens on contact, when two organisations have to work with each other. More recent research has applied that lens directly to the micro-mechanisms of integration in cross-border M&A. It has mostly stayed in the journals. This service is what it looks like applied to a real combined team on a Tuesday morning.
Diagnose. Intervene. Embed.
Diagnose
Both entities, before anything is designed
Confidential input from people on both sides of the combination — how they communicate, how they expect decisions to be made, and where they are already experiencing friction. The output is a friction map by function: not a culture score, but a specific picture of where the two organisations’ assumptions collide and what it is costing.
Intervene
Where the friction actually is
Targeted cross-cultural workshops with the combined teams that are carrying the integration, shaped by the diagnostic rather than delivered off the shelf. The team builds a shared language for naming cultural difference without blame, and agrees explicit norms for how this combined group communicates, decides and gives feedback.
Embed
After the room empties
Individual follow-up with the managers holding the cultural boundary, plus ongoing coaching and mentoring where the organisation wants the change to outlast the integration programme. This is the part that decides whether the norms survive the first difficult quarter.
There is no fixed price on this page, because the shape of the work depends on the deal — how many entities, which functions, how far past close you already are. Where the combined team can get in a room together, this often runs through a facilitated cross-cultural workshop. Where the integration spans several functions or geographies, it is scoped separately. Either way, the starting point is a conversation.
Where this comes from
Twenty-five years of intercultural work, and before the consulting, a working life spent building and running organisations in West Africa and the UK — hiring, restructuring, and leading teams through the kind of change that looks tidy in a plan and messy in a corridor.
The work spans sectors rather than specialising in one – technology, marine and offshore, insurance, NGOs, energy, professional services, manufacturing, life sciences and more. That range is deliberate, and it is the point: the mechanics of cultural friction are remarkably consistent across industries, because what collides in a merger is not sector knowledge but assumptions about how people are supposed to work. An engineering business and an insurer will surface the same five symptoms in different vocabulary. If you want the general case first, start with what cultural friction is, or the wider European and EMEA context for this work.
Before you get in touch
When in the deal should we bring in cultural support?
The highest-leverage window is signing to close, while integration planning is live and the working norms of the combined organisation are still being formed rather than corrected. Announcement to signing is also useful, mainly for framing the early communication. Most clients call much later than either, which is workable but more expensive.
Isn’t this what our integration consultants already do?
Integration consultancies are excellent at synergy tracking, operating model design and programme governance. Culture generally appears in that work as a workstream owned by someone with four other workstreams, measured by an engagement survey. What is usually missing is the specific, behavioural question of where two ways of working collide and what to do about it in practice. This sits alongside your integration programme rather than replacing any part of it.
We’re already 12 months post-close — is it too late?
No. It is more expensive than it needed to be, and the repair is genuinely harder than the prevention, because norms have now had a year to set and people have drawn conclusions about each other. But Stage 4 work is the most common engagement of the four, and it works. The honest framing is that we will be unpicking things rather than setting them.
How is this different from a culture survey?
A survey tells you how people feel about the organisation. This tells you where two organisations’ assumptions about normal behaviour are colliding, in which functions, and with what consequence. The output is a friction map and a set of agreed working norms, not a score to present to the board. Cross-cultural training and workshop delivery is part of the intervention — but it follows the diagnostic rather than substituting for it.
Do you work with the acquirer, the acquired entity, or both?
Both, and that matters. Work commissioned by one side and delivered only to the other reliably reads as re-education, which is the fastest way to harden exactly the divide you are trying to close. The engagement is designed so that both organisations are examined and both are asked to adapt. For the leadership capability side of this across the combined organisation, see leading and managing across cultures.
Start with a conversation
Tell me where you are in the deal and what you are seeing. If cultural friction is not your problem, I will say so — and if it is, you will leave the call with a clearer view of it either way.
Book a discovery call