Mergers and acquisitions start with ambition. With strategic logic. With the belief that 1 + 1 becomes more than 2. And on paper, this is often true.

But anyone who has been in organisations a little longer knows: the biggest challenge starts when the new colleagues arrive. What happens when two worlds have to come together? As soon as people have to work together, differences become palpable. In pace. In decision-making. In what is seen as 'normal'.

And it is precisely there in that often invisible layer that determines whether, and how quickly, a merger will actually work.

Culture is not an afterthought

In many merger processes, culture is still treated as a 'soft factor'. Something for later. Something you can address with a few workshops or a joint core values session.

But culture is not a layer on top of the organisation. It ís the organisation. It is in how decisions are made. In what is and is not spoken. In what people feel loyal to. So when two organisations come together, two sets of unwritten rules also come together. Two ways of seeing things. Two identities.

And that chafes. Always.

The inevitable us-side dynamic

Usually, a divide arises immediately after a merger. Sometimes explicitly, often subtly:

• "We of the old company"
• "They of the acquiring party"

This separation is not necessarily rational. But very human.

People are looking for a foothold. Especially in a context where a lot is changing. And they find that footing in what is familiar - their 'old' organisation, their way of working, their colleagues.

Before you know it, informal camps emerge.
Unspoken, but palpable in consultations, decision-making and cooperation.

What is lost (but rarely named)

What remains underexposed in many mergers is that there is also loss.

Loss of:

• Identity ("where do I belong now?")
• Status or position
• Familiar working methods
• Relationships and informal networks

That loss is rarely made explicit. After all, there is a future to build.

But what is not recognised does not disappear. It goes underground. In restraint. In resistance that is hard to pinpoint. In a lack of real commitment.

The impact on teams: less energy, more noise

At team level, this undercurrent quickly becomes visible.

Where before there was speed and clarity, now there is:

• More alignment
• More caution
• Less ownership

Psychological security is declining. People are watching the cat out of the tree.
What used to be taken for granted now becomes a subject of discussion.

Collaboration is becoming more syrupy. Not because people don't want to, but because they read each other differently.

What one person sees as decisiveness, another experiences as dominance.
What one person calls meticulous, feels like slow to another.

Without making this explicit, misinterpretations arise. And with it: distance.

Why many interventions do not work

In response to these dynamics, organisations often opt for familiar solutions:

• New structures
• Clear KPIs
• Culture programmes

While valuable, these interventions often do not touch the core. They remain on the surface.

What is missing is attention to what is really going on:

• Loyalty to the old
• The tension between different logics
• The mutual images and assumptions

Without making that layer explicit, true integration fails to materialise.

A systemic perspective: working with what is

What we see in our work is that sustainable movement only occurs when the undercurrent is included. That starts with acknowledging.

Acknowledging what was
Giving space to the history of both organisations. Without that recognition, there is no real movement forward.

Gaining insight into loyalties
People move based on reason and from connection. With their team, their leaders, their 'old' organisation.

Don't avoid tension, but exploit it
The tendency is to smooth over differences. But it is precisely in those differences that there is information. About what is important. About what wants to be preserved.

The role of leaders: carrying what cannot be solved

At this stage, good leadership is key.

Not in the classic sense of direction and decision-making but in the ability to tolerate complexity.

Effective leaders in mergers:

• Name what is exciting, even if there is no solution yet
• Give space to different perspectives
• Recognise undercurrents and make them negotiable
• Staying put, just when things get uncomfortable

This requires something other than 'managing'. It requires presence. Reflection. And the ability not to want to fix things too quickly.

How we support

In merger and acquisition contexts, we work at the intersection of team development and leadership.

Team programmes
We guide teams in exploring what is going on under the surface. We make differences explicit, break through we-they patterns and help teams reconnect with each other in a way that does justice to both backgrounds.

Leadership coaching
We support leaders in navigating complex dynamics. Understanding their own patterns, what they reinforce (often unconsciously), and how to create space for real movement.

Interventions at organisational level
From coaching MTs to designing moments when the 'old' can be completed and the 'new' can start visible, tangible and meaningful.

To conclude

Mergers and acquisitions rarely fail on strategy.
They fail on what is not seen.

The question, then, is not whether cultures clash.
They do.

The question is whether you are willing to look at what makes that clash visible and whether you really want to work with it.