Beyond the First 90 Days: What Executive Transitions Actually Require

Ranked World’s #1 Executive Coach by CEO Today, Navid Nazemian draws on his work with more than 250 executives across industries and geographies to explain why the first 90 days are only the beginning and why today’s executive transitions require a far deeper, longer, and more strategic approach.

| Written by Navid Nazemian

The “First 90 Days” has become one of the most quoted and often misunderstood concepts in leadership transitions. I have seen it shape countless onboarding programmes and help many leaders avoid early missteps. It remains valuable.

But at the executive level, it is nowhere near sufficient.

Many forget the subtitle, Critical Success Strategies for New Leaders at All Levels. What works at all levels does not fully address the realities, political dynamics, and systemic complexity of C-level roles.

And in today’s environment, the stakes are even higher. Executive transitions are increasing in frequency due to organisational redesign, digital acceleration, and ongoing geopolitical and economic volatility. Average tenure in senior roles, particularly for CEOs, is shortening, while expectations for early visible impact are rising. Hybrid work and globalised teams have made stakeholder alignment and culture shaping significantly more complex.

Through my work with more than 250 executives across industries and geographies, I have observed one consistent pattern: most transition failures happen after the first 90 days, not during them.

The Seduction of Time Bound Frameworks

Time bound frameworks feel comforting because they suggest progress, control, and predictability. However, executive transitions are rarely linear. They are dynamic, political, emotional, and deeply human experiences.

By the time the first 90 days conclude:

• Initial goodwill begins to fade

• Key stakeholders reassess expectations

• Real performance pressures emerge

• Cultural realities surface

• Resistance becomes more visible

It may be the end of onboarding, but it is certainly not the end of a transition. Many organisations still treat transitions as a 90-day onboarding exercise rather than a strategic leadership inflection point. Yet executive transitions are not administrative milestones. 

They shape culture, strategy, performance, and power dynamics simultaneously. When approached narrowly, they can quietly derail momentum. When approached strategically, they can accelerate enterprise-wide alignment and long-term performance.

Transitions Are a Process, Not a One-Off Event

Research shows executives typically need 12 to 18 months to fully adapt to a new C level role. That adaptation includes recalibrating identity, letting go of old success patterns, building trust and legitimacy, and learning how power actually works within the new organisation.

Yet organisations often declare success at day 90 or 100, just as complexity begins to peak. This creates a dangerous gap between perceived success and long term sustainability.

I often describe transitions through my Double Diamond Framework™ lens. Executive transitions unfold across multiple overlapping phases, requiring months before sustainable traction is achieved. The first 90 days may establish direction, but they rarely determine durability.

Success depends less on individual brilliance and more on context navigation, stakeholder integration, timing of decisions, and the leader’s willingness to evolve their own leadership identity.

The first 90 days may set direction, but true executive success depends on how leaders navigate identity shifts, organisational complexity, and sustained impact long after onboarding ends.

The Three Phases Executives Must Navigate

Successful transitions tend to follow three overlapping phases:

Arrival

Understanding the context, people, and mandate.

Survival

Managing pressure, ambiguity, resistance, and personal energy.

Thriving

Creating impact, shaping culture, and building a leadership legacy.

These phases look very different depending on the context. A first-time C-level leader stepping into enterprise-wide accountability must recalibrate from functional excellence to systemic leadership. 

An external hire entering a complex stakeholder ecosystem must establish credibility without overplaying authority. Internal promotions often underestimate how quickly peer dynamics shift. Global relocations introduce cultural nuance and informal power structures that cannot be understood from an org chart.

In transformation, turnaround, or post-merger integration environments, the tension intensifies. Leaders are expected to reshape direction while simultaneously stabilising performance. The transition becomes both strategic and deeply personal.

Most onboarding frameworks focus almost exclusively on arrival. Very few address survival. Almost none are intentionally designed for thriving.

Why Smart Leaders Still Struggle

Executive transitions challenge more than capability. They challenge identity itself. Leaders must let go of being the expert, being liked, being certain, and being fast.

Instead, they learn to ask better questions, tolerate ambiguity, read wider organisational systems, and lead through influence rather than authority. Navid emphasises that this internal transition is rarely acknowledged, even though it is often where leaders stumble.

What Sustained Transition Mastery Looks Like

Executives who transition successfully over time tend to follow several consistent practices:

• They slow down sense making before speeding up execution

• They invest deliberately in key stakeholder alignment

• They test assumptions early and often

• They build feedback loops instead of relying purely on intuition

• They protect reflection time and resist the urge to overload their calendars

Consider a newly appointed CFO in a multinational organisation who delivered technically strong early results. Financial metrics improved, but regional alignment suffered. The transition stalled not because of capability, but because stakeholder integration and expectation-setting had been underinvested.

Or a first-time CEO promoted internally who moved too quickly to signal change, unintentionally destabilising trusted leadership relationships. The turning point came not from sharper strategy, but from recalibrating pace and communication.

In contrast, I worked with an external CHRO hired during a transformation who deliberately extended the listening phase, mapped informal influence networks, and co-created early priorities. The result was stronger long-term credibility and far greater adoption of change initiatives.

What Organisations Can Do Better

If organisations want executives to succeed beyond the first 90 days, they must extend onboarding into structured transition journeys and normalise the emotional and identity challenges of leadership change.

They should provide confidential expert support such as executive transition coaches during high risk phases and measure transition success beyond early deliverables. Executive transitions remain one of the few leadership moments where relatively small investments can yield disproportionate returns.

The real question is not whether the first 90 days matter. They absolutely do.

The deeper question is whether organisations and leaders are willing to recognise that those first months are only the beginning of a 12 to 18 month leadership inflection point. The ultimate aim is not fast impact alone. It is sustainable traction, credibility, clarity, and alignment that endure long after onboarding ends.