Leadership Transitions Are Predictable: Why Do We Treat Them Like Surprises?

When a new leader is appointed and starts in their new role, the organization often is filled with optimism, but the transition may be managed with assumptions. Most frequently, there is a mix of emotions on the team they are chosen to lead. The success of the new leader can be left to chance or the organization can manage the transition to improve the likelihood of that leader’s success and help that team continue to perform.

I’ll share a real-world example. A federal agency appointed a new director to lead a major operational center. The leader was a strong internal candidate who was experienced, respected, and knew the organization from the inside out. Most people in the organization expected continuity and perhaps some marginal improvements.

That expectation proved optimistic.

The outgoing leader had operated with a centralized, directive style that created clarity and implicit alignment. The incoming leader brought a different philosophy that was more inclusive, more collaborative, and intentionally less hierarchical. On paper, the shift aligned with modern leadership thinking.

In practice, performance declined. Employees filed grievances. Turnover soared. All of these increased costs while service delivery declined. Decision-making slowed as authority became less explicit. A unprepared workforce accustomed to clear direction was now making more of their own decisions. At the same time, long-suppressed frustrations, previously contained under the former leader, began to surface without a structured mechanism to address them.

What followed was not unusual: rising friction, increased formal complaints, and continued erosion of performance. By the time organizational interventions were introduced, the system had already destabilized. The leader was ultimately reassigned.

This outcome was not the result of poor leadership. It was the result of a poorly managed transition.

The Pattern Is More Predictable Than It Appears

Situations like this are often treated as unique. In practice, they tend to follow a consistent set of dynamics.

First, leadership style changes often outpace team readiness. A leader may intentionally shift how decisions are made shifting toward greater inclusion or distributed ownership, but teams are not always prepared to operate effectively in that new model. The result is hesitation rather than empowerment.

Second, decision clarity frequently erodes before it is reestablished. When leadership changes, previously understood norms around authority and accountability can become ambiguous. In that gap, organizations often experience slower decision-making and reduced execution velocity.

Third, underlying organizational issues surface without structure. Leadership transitions can create space for concerns that were previously suppressed or managed informally. While this can be healthy in the long term, the absence of a structured process to channel those concerns can amplify instability in the short term.

None of these dynamics are surprising. They are typical features of a system in transition.

The Role of Time—and What Happens During It

Research reinforces the idea that leadership transitions require more than simple adjustment. Leaders commonly take a year or more to reach full effectiveness in new roles. During that time, expectations, relationships, and operating norms are still being recalibrated.

At the same time, leadership changes influence more than the leader’s performance alone. Managers account for a substantial portion of the variance in employee engagement. When leadership shifts, engagement can fluctuate accordingly, particularly when expectations and priorities are not clearly aligned.

Leadership derailment research further underscores the stakes. A meaningful proportion of leaders underperform or fail in their roles often due to misalignment with context rather than lack of capability. Transitions tend to amplify that risk, as both the leader and the system are adapting simultaneously.

Taken together, these findings point to a consistent conclusion: leadership transitions are not isolated events. They are periods of elevated organizational vulnerability.

The Assumption Gap

If these dynamics are so consistent, why are leadership transitions so often treated as surprises? In many cases, the issue is not that organizations hold incorrect assumptions—it is that their assumptions are never made explicit.

We refer to this as the Assumption Gap defined as the space between what leaders believe will happen during a transition and what is actually defined, aligned, and managed. In the example above, expectations were never explicitly clarified. There was no shared understanding of how leadership style would shift, how the team would need to adapt, or how decisions would be made going forward.

Instead, the organization appeared to operate on a set of implicit beliefs that the team was stable, that a qualified leader would build naturally on past performance, and that continuity would outweigh disruption. These assumptions were not unreasonable, but they were unexamined. Leadership transitions frequently falter not because assumptions are wrong but because they remain implicit and unmanaged.

A Different Way to Think About Transitions

Organizations often approach leadership transitions as staffing decisions, focused on selecting the right individual and supporting them through onboarding.

But transitions are not just about individuals, they are about systems.

A leadership change reshapes expectations, relationships, decision rights, and norms. Without deliberate effort to realign those elements, performance variability should not be surprising; it should be expected.

Organizations that navigate transitions more effectively tend to approach them as structured processes rather than informal adjustments. They surface assumptions early. They align expectations explicitly. They clarify how the team will operate under new leadership before performance is tested. They do not eliminate uncertainty, but they reduce the likelihood that uncertainty turns into sustained underperformance.

The Strategic Question

Leadership transitions will continue to be a constant in organizational life. Promotions, new hires, and succession events are unavoidable. The more relevant question is how those transitions are managed. If the patterns are predictable and the risks well understood then the outcome is less a matter of chance and more a matter of design. For leaders facing an upcoming transition, the question is not whether performance will be affected. It is whether the organization will recognize and close the Assumption Gap before it begins.