What goes wrong?
The roots of failure start before a deal is even announced or closed. In the intensity of pre-deal strategy and planning, companies spend enormous time on the strategy and financials. But leadership due diligence — decisions about who leads, how the team is structured, where capability gaps exist — are often deferred. Here are the common mistakes we see companies make early on that set a deal up to fail.
Companies have a robust synergy thesis for an acquisition but often have an incomplete view of whether the current leadership bench (in either organization) can actually deliver it.
They don’t anticipate key capability gaps. Companies have a robust synergy thesis for an acquisition but often have an incomplete view of whether the current leadership bench (in either organization) can actually deliver it. As a result, leadership requirements are assumed rather than defined and tested, even for the mission-critical roles that are disproportionately critical for driving integration success and the post-deal strategy. Furthermore, most companies lack an objective, data-backed method for evaluating, comparing and selecting top talent, particularly in assessing the soft skills that are important for integration. Once a deal is on the table, horse trading for top roles or selecting “compromise” candidates exacerbates the challenge.
They underestimate talent flight risk. Recruiting calls to top leaders may begin almost immediately after a deal is announced. Without a ready retention strategy, the very people who the company will need to carry out the merger integration could be quickly lured away. The longer it takes to make key leadership decisions — and the less transparency there is around those decisions — the more uncertainty grows in the post-announcement period, increasing the likelihood that valuable talent will leave.
They allow misalignment and uncertainty among key leaders to fester. Nothing destabilizes integration efforts faster than poor team dynamics, mistrust and disengagement. When companies don’t agree early on decision rights, governance and a strong “integration spine” defining who drives what and how conflicts are resolved, the organization can’t mobilize. Uncertainty breeds inaction and distrust, encouraging leaders to view the integration process as a battleground to see who emerges victorious. Leaders jockey for roles or disengage, collaboration becomes non-existent, and decision-making slows down, costing valuable time and progress.
They treat culture as a “soft” issue to be deferred. Companies often don’t test cultural compatibility early and later discover cultural friction is what slows execution. Even if “overall culture” looks compatible, business unit and geographic subcultures may diverge, setting up conflict and slowing progress on key objectives.
They fail to reset leadership for the new enterprise. Once the initial integration workplan is “done,” execution fatigue and drift into “business as usual” can weaken accountability and slow momentum on value-building efforts. The leadership profile needed to stabilize integration is not always the one needed to scale growth, transform operating models or pursue new strategic moves.
A four-step talent agenda for value creation
In our experience, the success or failure of a merger or acquisition is less about individual leaders and more about aligning the top team and culture with where the organization is trying to go. This includes ensuring a fair and evidence-based selection of top leaders, creating a unified enterprise-wide approach to succession and leadership development, and defining a target culture, shared vision and identity to align the combined organization.
The success or failure of a merger or acquisition is less about individual leaders and more about aligning the top team and culture with where the organization is trying to go.
A recent example with a global retail company demonstrated the advantage of this approach. Anchored in a well-defined target culture tied to the strategy, this work included assessing and selecting leaders, aligning teams and creating a leadership model to inform future development and leader selection. A year post merger, sales had increased — by nearly 25% in the company’s priority online channels — while profits tripled. As the CEO told us later, “We delivered synergies ahead of schedule and continued to show underlying operating margin expansion, with stable or increasing market share in our major markets.”
Here are four recommendations for creating value through leadership throughout the deal life cycle.
1. Start evaluating leadership needs before the deal is signed
Leadership due diligence, just as much as financial or operational diligence, sets the deal up for success by defining what leaders must deliver based on the deal thesis and surfacing capability risks and gaps early. Stress-testing which leaders can scale and execute under integration conditions — and identifying where gaps, flight risks and misalignments will slow value capture — set the company up to make faster and more confident selection decisions for critical roles.
In the due diligence period, tap into external perspectives about potential leadership risks through confidential, outside-in referencing on the target company’s CEO or management team. Identify the potential leavers and roles most dangerous to lose and build a retention strategy tied to culture, leader motivations and the future of the business.
The deal should be used to upgrade talent. Leadership selections should be merit based, not the result of “horse trading” or compromises between legacy organizations. Using a fact-based, objective assessment is a critical tool for deciding among candidates for top roles. Assessments should include change management skills that are critical to the success of the integration as well as leaders’ ability to adjust and grow with changes in the business. An independent assessment can provide a consistent view of executives across companies, minimize fears of favoritism by applying objective standards and speed decision-making. Such assessments also can identify gaps that may need to be filled by external hiring and potential assignments for internal candidates who did not get the roles they expected.
2. Align the leadership team
Aligned leadership unlocks integration value. However, it’s easy to underestimate the challenges of bringing together two groups of leaders — especially when they were successful in their respective organizations. Amid the stress and uncertainty inherent in a merger, even the most senior executives are susceptible to emotional reactions, which can lead to turf wars, territorialism, petty politics and hurt feelings.
Recognizing the personal challenges inherent in the transition and working together to define the rules of engagement for the new top team — aligning on priorities, decision rights, conflict resolution, what “synergy delivery” means operationally, and how to prevent drift and fatigue — enables newly formed leadership teams to perform better and faster and creates a foundation for building understanding and trust.
3. Identify potential cultural barriers and begin to build bridges between the two organizations
For a merger to achieve its target value, people from the two companies have to be willing to share ideas, work together on customer business and treat new colleagues as if they’re all on one team. But when bringing together people from two distinct cultures, opportunities abound for misunderstandings, mistrust and confusion.
Culture compatibility shouldn’t be treated as a “later” issue, but as a deal-risk variable. Early on, it’s important to define the culture and leadership behaviors needed for the combined company’s strategy to succeed and identify the likely cultural resistance and friction points. This includes assessing the culture and operating norms of each organization and the behavior shifts needed to successfully integrate them, charting a clear path that preserves strengths from both cultures.
4. Evolve leadership for long-term value and growth
Strategy isn’t static, but too often, leadership is treated as if it were. Over time, the deal demands more from leadership. Fatigue and natural turnover will spur transitions. And the needs of the business will evolve in response to growth, increased scale and complexity, and new operating models. Proactively reshaping leadership enables you to meet those demands.
Reassess leadership against the future-state needs of the combined company. Select leaders who can grow as demands change and ensure that succession plans develop a leadership bench built for sustained performance rather than the integration moment alone. The CEO should proactively reshape the top team as strategy matures and structure onboarding and coaching to make sure leaders are able to deliver in their new context, not just “transition successfully.”
Leadership reviews should go beyond decisions about people and individual roles and include the effectiveness of the top team, the operating rhythm and the culture. Review and refine how the new leadership team makes decisions, aligns priorities and executes across legacy lines. Measure how culture has shifted and what friction points remain, translating insights into practical interventions that unlock speed and accountability.
• • •
Integration goals range from “we’re not going to touch it” to full assimilation. But regardless of intention, ownership alone creates expectations and changes operating requirements. Leaders still need to manage a new reality, looking not just at the immediate integration but in terms of setting the combined organization up for future success.
As valuation models and strategic analysis related to the legal, financial and operational elements of mergers and acquisitions have become more sophisticated, fewer deals fail because they are a poor fit strategically or because the buyer paid too much. More often, mergers and acquisitions fail to deliver the anticipated value because companies do not bring enough rigor and attention to “soft” issues like talent evaluation and selection, cultural alignment and team integration. With so much at stake, leaders must invest early in a thoughtful process for selecting the right people for each position, building cultural bridges across the organization and unifying the new top team so that they work together to deliver deal value faster.