Whitepaper · Part I · 2026

The Seasonal Leader.

Why every season of growth asks for a different leader. And why leadership today belongs to those who can both design and deliver.

AuthorIneke Kooistra
PublishedMarch 2026
Reading time15 minutes
Free to readCite with attribution
Executive summary · 01

Why leadership selection fails, and what growth companies need instead.

Leadership is not a title. It is the ability to create impact in a specific context.

I have spent a lot of time in boardrooms. Sometimes as an adviser, sometimes as an interim CEO, often as an executive search partner. What strikes me is not a lack of ambition, and not a lack of strategy. Most organisations know exactly what needs to change. What they miss is harder to see: whether the leader in front of them fits the moment the company is actually in.

This paper makes one argument. Leadership selection should be based on context, behaviour, courage and execution, not on titles, networks or an impressive past. The question is no longer who looks right on paper. It is who can truly lead this organisation, now.

The deeper shift is this. Execution has not simply become more important. Leadership can no longer outsource it. The leader who designs the strategy and the leader who delivers it are now the same person.

The new market reality · 02

The problem with traditional executive search.

Too many leadership appointments still begin with the wrong assumption: that the best candidate is the one with the most impressive background. But a strong profile is not the same as a strong fit. A leader who excelled in one environment can quietly fail in another, not because they lost their ability, but because the environment changed.

Organisations today live under constant pressure, from growth, succession, restructuring, internationalisation. In that reality the cost of a wrong leadership decision is high: lost time, weak execution, internal friction, missed momentum. The market is active, but far less forgiving. Appointments take longer, conversations go deeper, and the room for an almost-right match has all but disappeared.

That is not a slowing market. It is a more selective one. Which means search has to become something more than profile matching. It has to become the work of understanding context, challenge and real potential.

The new market reality · 03

The shift from profile to contextual relevance.

The business environment has become more complex. Companies are expected to move faster, adapt sooner, and lead through uncertainty. That changes what leadership requires. Industry knowledge and a strong track record are no longer enough. Organisations need leaders who can build trust, drive change, decide under pressure, and create momentum when the ground is shifting.

This is especially true in moments of transition: a growth phase, a succession, an international move, private equity coming in, a turnaround. In those moments the right leader is rarely the most obvious one. It is the person who matches the phase, the challenge and the culture.

The myth of the one-size-fits-all CEO no longer holds. Leadership is contextual and seasonal.
My view · 04

Courage. Character. Execution. Context.

I believe leadership should be judged in context. That means looking past the résumé, at how a person leads, how they decide, how they create energy, and how they behave when the pressure is on. The leaders who succeed tend to combine four things.

One

Courage

To make hard decisions, even against uncertainty or resistance.

Two

Character

To build the trust that collaboration and influence depend on.

Three

Execution

To turn strategy into decisive action and real results.

Four

Context

To understand deeply what this organisation needs, right now.

A leader who succeeds is not simply someone with the right experience. It is someone whose strengths match the specific moment of the business.

Seasonal thinking · 05

The Seasonal Leader.

The idea that one leader can excel across every phase of an organisation is appealing, and fundamentally flawed. Every company moves through seasons, and each season asks for a different kind of leader. This is the framework that gives this platform its name, and it is the lens the interviews here are read through.

A note on where this comes from. The thought that organisations move through phases, and that a strength which fits one phase can strain the next, is not new. It runs back to Ichak Adizes and Larry Greiner on corporate life cycles. What I have tried to add is a practical translation for the people actually leading through it: naming the seasons, giving each a recognisable archetype, and making the shift discussable early. I was writing about the seasonal CEO in the Dutch market before the idea reached the larger stages, not because I coined it, but because I had lived it. And it matters more now than it used to. Companies move faster, phases turn quicker, and the cost of a leader who no longer fits the moment has never been higher.

Spring · Growth spurt

The Founder

Scale · Hire · Accelerate
  • Sets pace and direction from the front
  • Hires fast and energises early teams
  • Comfortable with ambiguity and white space
  • Builds belief faster than the org chart keeps up
Summer · Crisis

The Builder

Reposition · Decide · Cut
  • Makes calls under real pressure
  • Repositions in the market and inside the org
  • Translates urgency into clarity
  • Comfortable cutting what no longer fits
Autumn · Innovation

The Strategist

Structure · Align · Deliver
  • Builds the operating system underneath growth
  • Aligns the team around fewer bets
  • Turns ambition into rhythm
  • Knows when to slow down to speed up
Winter · Consolidation

The Reset

Simplify · Optimise · Steady
  • A steady hand when the noise is loudest
  • Simplifies portfolio, structure, decisions
  • Restores discipline without rigidity
  • Prepares the ground for the next spring
The mistake is rarely the leader. It is the mismatch with the phase.

And you, as a leader? Are you in the right season, with the right strengths for it? Stay sharp, stay active, and do not wait until it is too late. Start the conversation, with yourself and with your board or founders. Honesty is what moves you forward, and the organisation with you.

The new market reality · 06

Strategy is rarely the issue. Execution almost always is.

In most organisations I work with, strategy is not the primary problem. The direction is usually well thought through and broadly supported. Where it breaks down is in the translation of that strategy into action. What looks like a strategic challenge is, in reality, an execution gap.

Decisions are delayed. The meeting ends, but ownership never quite lands.

Priorities stay diffuse. Everything is important, so nothing is decisive.

Ownership blurs. Everyone is involved, no one is responsible.

Momentum slows. Calendars fill up, but nothing actually shifts.

Organisations tend to overinvest in defining direction and underinvest in making sure that direction becomes decisions and behaviour. The problem is not strategy. It is translation. The most effective leaders I see are neither pure visionaries nor pure operators. They take strategy, break it into decisions, structure it into rhythm, and build teams that execute without constant intervention. They are translators.

Framework · 07

FLOW: the structural layer of execution.

From my work as interim CEO I built two practical frameworks to make execution tangible. FLOW is the structural layer, the machinery that turns direction into movement.

F

Focus

Clarity on priorities, and deliberate trade-offs. What we choose, and what we let go.

L

Leadership

Ownership of decisions and accountability. Who decides, and by when.

O

Operating rhythm

A cadence that ensures follow-through. The meeting that actually moves the work.

W

Winning teams

Alignment and strength at the top. Edge, ownership, trust.

Organisations with FLOW in place move with a pace you can feel. Those without it stay stuck, however strong the strategy looks on paper. Research backs what practice shows: according to McKinsey, roughly seven in ten large-scale transformations fail, not from flawed strategy, but from insufficient execution.

Framework · 08

BRIGHT: the behavioural layer leaders underestimate.

Execution is not only structural. It is deeply behavioural. Harvard Business Review found that teams with low behavioural trust make decisions markedly slower, in some cases up to 40% slower than high-trust teams. That is not a soft finding. It shows up directly in time-to-market and in the ability to move under pressure.

B

Behaviour

How people act under pressure, and how fast decisions really get made.

R

Roles

Are roles clear enough to allow fast, unambiguous decisions?

I

Impact

Is everyone clear on what success looks like, and what their part means?

G

Goals

Are goals shared, understood, and actively driving daily behaviour?

H

High trust

Is there enough trust to have honest conversations and move quickly?

T

Tempo

Does the pace of the team match the demands of the organisation?

In many leadership teams the misalignment is invisible in the strategy documents, but obvious in daily interactions. Decisions get revisited, accountability is unclear, hard conversations are avoided. Leaders underestimate how much behaviour determines speed.

A case from practice · 09

When tempo, not capability, is the issue.

“We are actually quite happy with our CEO. And with the team. But we are not seeing the results. Decisions take too long, and the actions we agree keep sliding to the long term.”

A supervisory board chair, in a recent conversation

The issue was not competence or vision. It was tempo. The team shared respect and a common direction, but goodwill alone does not make a management team perform. It needs ownership, edge, and the willingness to challenge each other. I did not bring a new framework. I worked with their own agenda, because that is where the real work and the real blockages sit. In a single day we pushed past the usual meeting rhetoric to four direct questions.

What is the absolute priority, and what are we willing to deprioritise to protect it?

Who decides, and by when?

Who is genuinely helping whom, and where are we leaving each other alone?

Does our meeting rhythm create momentum, or consume it?

Decisions that once took weeks now took days. Actions moved from long-term aspiration to immediate implementation, and clients noticed. The issue was never the people. It was the system they worked in. BRIGHT does not fix people. It optimises the conditions for success.

Board brief · 10

Key takeaways for boards, investors and leadership teams.

Search is more selective, not slower. Higher expectations of leadership, not lower demand.

Execution gap, not strategy gap. The problem is rarely the plan. It is the translation into action.

Design and deliver together. The old split between thinker and doer is no longer viable.

Context over pedigree. Effectiveness is set by the phase and its challenges, not by past titles.

The rising cost of mismatch. A leader who does not fit the phase creates delays no one can afford.

The executive search market is not becoming more complex. It is becoming more precise.

What is changing is not the availability of talent, but the clarity with which leadership is judged. The gap between what leaders promise and what organisations experience has become visible, and in that visibility, expectations have shifted. The best leadership decisions are rarely the most obvious ones. They are the ones that combine context, judgment and courage.

IK

Ineke Kooistra

Founder of HIGH SEASON. She works as an interim CEO, strategic adviser and operating partner alongside founders, boards, investors and C-suites, in the moments that decide whether companies grow, stall, or break. She founded ELiN Partners, an executive search boutique, and was Group CEO of YoungCapital and Circle8 Group. Commissioner at AFAS Software, member of SER Topvrouwen, columnist for MT/Sprout. inekekooistra.com ↗