25-09-2026
When organisations merge or acquire another company, the conversation quickly turns to strategy, synergies, structures and systems. And for good reason. These are the tangible elements of integration: the things that need to be designed, decided and implemented.
But there is another dimension of M&A that is much less visible: the psychological one. When two organisations come together, it is not only their structures, processes and systems that have to be integrated. People also have to make sense of what the change means for their identity and sense of belonging.
This raises an important question that can easily get lost in the practicalities of an integration: what happens when two organisational identities collide?
Organisations don’t just merge – identities do too
We often talk about organisations as if they were structures that can be combined through design: two operating models become one, two HR functions become one, and two sets of processes are harmonised. People experience it differently. Work is not only about tasks, responsibilities and processes. Organisations can also become an important part of how people define themselves, providing a sense of belonging, shared purpose and an answer to the question of who “we” are.
This is the basic premise of the Social Identity Theory (e.g. Tajfel, 1974): people partly define themselves through the groups they belong to, including the organisations they work for. When an organisation is acquired or merged, that identity can suddenly become less certain. Who are we now? What happens to what made our organisation distinctive? Where do I belong? And perhaps most importantly: what does this new organisation say about who we are?
Research on social identity in M&A suggests that employees can continue to identify strongly with their pre-merger organisation even as the formal organisation changes. In some circumstances, the old identity can become even more salient when it feels threatened. This can contribute to an “us versus them” dynamic between employees from the former organisations – not necessarily because people are unwilling to collaborate, but because their sense of identity and belonging is being challenged. Giessner, Ullrich and van Dick (2011; 2012) describe these dynamics in their analysis of social identity in mergers and acquisitions, highlighting the importance of understanding both pre-merger identities and the process through which a new shared identity develops.
The merger may be legally complete. Psychologically, however, the integration may have only just begun.
When “us and them” becomes part of the integration
Consider some of the decisions that are made during a typical integration. Which leadership team takes the lead? Whose systems are retained? Which processes become the new standard? Where is the new headquarters? Which terminology do people use? Which organisation’s ways of working become the model for the future?
On paper, these may be operational decisions. To employees, they can also carry a symbolic message. They can communicate who has status, whose expertise is valued and which legacy organisation is expected to adapt.
This is where social identity becomes particularly relevant. Giessner and colleagues (2012) identify status relationships, identity continuity and fairness perceptions as important factors in understanding post-merger identification. The integration process is therefore not simply about creating a new organisational identity; it is also about managing the relationships between the identities that already exist.
Every integration decision can send a message about whose identity matters.
Three factors that shape the new identity
So what determines whether people can begin to identify with the new organisation? Three considerations are particularly important: perceived status, continuity and fairness.
First, perceived status. Mergers are often presented as bringing two organisations together as equals, but employees may experience something different. If one organisation is perceived as the “winner” and the other as the “acquired” or “less successful” side, this can create status differences between groups. Such differences can fuel comparisons and intergroup tensions. Employees may become more attached to their former organisation precisely because its status feels threatened. This means that integration leaders need to pay attention not only to what decisions are made, but also to what those decisions communicate about the relative value of the groups involved.
Second, continuity. Creating something new does not necessarily mean discarding everything that came before. Employees may find it easier to identify with a new organisation when they can see a meaningful connection between their previous organisation and the future organisation. What are we taking with us? What are we deliberately preserving? Which aspects of our history, expertise or culture remain part of who we are? Continuity can provide an important bridge between the old and the new. Rather than asking employees to leave their previous identity behind, an integration can acknowledge that parts of that identity can continue to have value in the organisation that is being created.
Third, fairness. Integration inevitably involves decisions that affect employees differently. Some practices will stay, others will disappear, roles will change, and leadership positions may be reassigned. Employees do not evaluate these decisions purely on operational logic. They also form perceptions about whether the process has been fair. Was our organisation listened to? Were decisions explained? Were both sides given a meaningful voice? Are the consequences distributed fairly? Fairness therefore matters not only because people care about the outcome, but because the process itself communicates whether they and their group are valued.
Integration is more than structural
This perspective has important implications for HR and organisational transformation professionals. An integration plan can be operationally sound and still struggle if people do not develop a sense of belonging in the new organisation.
Alongside questions about systems, processes, governance and organisational design, integration teams can therefore benefit from asking a different set of questions as well:
- Do employees understand what the new organisation stands for?
- Do they see themselves as part of it?
- Where might “us versus them” dynamics emerge?
- What elements of the former organisations should be preserved?
- Are employees experiencing the integration process as fair?
- What do integration decisions communicate about the status and value of each legacy organisation?
- And what story are leaders telling about the organisation they are becoming?
These questions may not appear on a synergy dashboard, but they can influence whether people are willing to invest in the organisation that the integration is trying to create.
From integration to identification
For HR professionals, this creates a subtle but important shift in perspective. The goal of an integration is often described as bringing two organisations together. But bringing organisations together does not automatically mean that employees feel part of the same organisation.
A new organisational chart can be implemented. A new HR operating model can be designed and rolled out. Systems can be migrated and processes can be harmonised. But a shared organisational identity takes longer. It develops through leadership, communication, experiences and the everyday signals employees receive about what – and who – belongs in the new organisation.
For Quintop, this perspective adds an important layer to how we think about organisational transformation. Whether the challenge is an M&A integration, organisational redesign or a change in the HR operating model, structural change ultimately becomes real through the people experiencing it. Understanding how people experience identity, belonging and change can therefore help organisations look beyond the formal integration plan and consider what is happening beneath it.
The question is not only: How do we integrate two organisations?
It is also: How do we help people see themselves in the organisation we are creating?
Because organisations don’t just merge.
Identities do too.
References & further reading
- Giessner, S. R., Ullrich, J., & van Dick, R. (2011). Social Identity and Corporate Mergers. Social and Personality Psychology Compass, 5(6), 333–345.
- Giessner, S. R., Ullrich, J., & van Dick, R. (2012). A Social Identity Analysis of Mergers & Acquisitions. In D. Faulkner, S. Teerikangas, & J. J. Rees (Eds.), The Handbook of Mergers & Acquisitions (pp. 474–495). Oxford University Press.
- Tajfel, H. (1974). Social identity and intergroup behaviour. Social science information, 13(2), 65-93.
