Your First 90 Days Could Shape the Next 10 Years: A Practical Guide for New Senior Leaders

Blog
Tips

Landing a senior leadership role is something to celebrate.

Whether you’ve become a Managing Director, Operations Director, Commercial Director or joined the board of a growing SME, you’ve earned your place through years of hard work, technical expertise and delivering results.

But here’s the uncomfortable truth.

What got you here won’t necessarily keep you here.

The skills that made you an exceptional functional expert aren’t the same skills needed to lead an organisation, influence senior stakeholders and inspire high-performing teams.

Research consistently shows that leadership transitions are one of the highest-risk periods in a leader’s career. Leadership expert Michael Watkins, author of The First 90 Days, argues that the decisions leaders make during this period often determine whether they accelerate their success or spend years rebuilding credibility.

Closer to home, the Chartered Management Institute (CMI) reports that 82% of UK managers enter management without any formal management or leadership training. At the same time, Gallup research shows that managers account for around 70% of the variance in employee engagement, highlighting just how much influence great leadership has on business performance.

Those first 90 days shape relationships, establish credibility and often determine how your leadership will be judged for years to come.

The good news? The most successful leaders don’t try to have all the answers on day one. Instead, they focus on understanding before changing, listening before leading and building trust before driving transformation.

The Biggest Mistake New Leaders Make: The Action Trap

One of the most common mistakes new senior leaders make is what leadership experts describe as the Action Trap.

After months of interviews and expectations, it’s natural to feel pressure to prove your value quickly. Many leaders respond by launching new initiatives, restructuring teams or changing processes almost immediately.

While this feels productive, it can damage credibility.

Without understanding the business, its history, culture and informal networks, even well-intentioned changes can create unnecessary resistance.

The strongest leaders recognise that the first few weeks aren’t about proving how much they know—they’re about learning as much as they can.

Before making your first significant decision, ask yourself:

What assumptions am I making?
What don’t I know yet?
Who understands this business better than I do?
Have I listened to enough people before deciding?

The answers often determine whether your first major decisions are built on insight or instinct.

Leadership Tip: The best leaders don’t rush to make an impact. They take time to understand the business before deciding how to improve it.

Every Leadership Situation Is Different

No two leadership transitions are the same.

Leading a fast-growing business requires a different approach from leading a turnaround. Joining a successful, established organisation demands different behaviours than entering a business facing significant change.

That’s why experienced leaders avoid a one-size-fits-all approach.

Before making significant decisions, spend time understanding:

The commercial challenges facing the business.
The organisational culture.
What is already working well.
Where genuine opportunities for improvement exist.
What success will look like in 12 months’ time.

Only then can you decide what needs to change and what should stay exactly as it is.

Leadership by the Numbers

Good leadership isn’t just good for people it delivers measurable business results.

82% of UK managers receive no formal leadership training before stepping into management (CMI).
70% of employee engagement is influenced by the quality of the manager (Gallup).
Highly engaged teams are associated with higher productivity, lower absenteeism and stronger profitability than disengaged teams (Gallup).
Poor management continues to be recognised as one of the biggest barriers to improving UK productivity (CMI).

Leadership is no longer a “soft skill”. It’s a commercial advantage.

Listen More Than You Speak.

One of the simplest but most powerful things you can do in your first month is meet people.

Not to present your strategy.

To understand theirs.

Structured conversations with board members, peers, direct reports and frontline colleagues often reveal far more than reports or dashboards ever will.

We encourage new leaders to ask consistent questions during these meetings, including:

What are our biggest challenges?
What opportunities are we not taking advantage of?
What should never change?
If you were in my position, what would you focus on first?

Patterns quickly emerge.

They help you separate symptoms from root causes and identify where your leadership can have the greatest impact.

Think in Phases, Not Big Bangs.

Many new leaders feel they need to transform everything immediately.

In reality, successful transitions usually happen in stages.

Days 1 – 30: Listen and Learn

Build relationships.
Understand the financials.
Observe the culture.
Identify key stakeholders.

Days 31 – 60: Create Alignment

Clarify priorities.
Identify achievable quick wins.
Build confidence with your team and senior stakeholders.

Days 61 – 90: Build Momentum

Start implementing agreed priorities.
Delegate effectively.
Celebrate early successes.
Refine your longer-term strategy.

The objective isn’t simply to make change quickly.

It’s to make the right changes with the support of the people around you.

Download The Lead Talent Leader Success Guide Here.

Seven Leadership Habits That Build Credibility

During your first 90 days, focus on developing habits that build confidence in your leadership:

Listen before making decisions.
Ask questions before giving answers.
Be visible across the organisation.
Communicate consistently and honestly.
Build trust with key stakeholders.
Celebrate early successes.
Stay curious.

Remember, people rarely expect a new leader to know everything—but they do expect consistency, honesty and sound judgement.

These behaviours create credibility long before your first major strategic initiative delivers results.

Before You Make Your First Big Decision…

Take five minutes to ask yourself:

✔ Have I spoken to enough people?

✔ Do I understand why things are done this way?

✔ Am I solving the real problem—or just the most visible one?

✔ Will this decision build trust or reduce it?

Great leaders rarely regret taking time to understand before taking action.

You Don’t Have to Navigate It Alone

Elite athletes have coaches.

Professional sports teams have experienced mentors.

The most successful business leaders also recognise the value of having an independent sounding board.

Leadership can be surprisingly isolating—particularly when you’re balancing board expectations, managing former peers or making decisions that affect the future of the business.

Having someone outside the organisation who can challenge your thinking, offer perspective and share practical experience often accelerates both confidence and performance.

Whether you’re stepping into your first senior leadership role or preparing the next generation of leaders within your business, having the right support can make the difference between surviving the transition and thriving in it.

Your Leadership Legacy Starts Today

Your first 90 days aren’t about having all the answers.

They’re about asking the right questions.

The relationships you build, the trust you create and the decisions you make during those first few months will influence your reputation long after the onboarding process has finished.

At Lead Talent, we’ve helped leaders across the UK navigate career transitions, develop high-performing teams and build sustainable leadership capability through executive mentoring, coaching and leadership development.

Ready to Build Your Leadership Impact?

If you’re about to step into a senior leadership role or you’ve recently made the move, we’d be delighted to help you make those first 90 days count.

Whether you need an experienced mentor, executive coaching or a confidential sounding board, our practical, commercially focused approach has helped leaders across the UK build confidence, avoid common pitfalls and deliver lasting results.

Speak to Patrick Maloney today for a confidential conversation about your leadership journey.

Call: 0771532650

Email: Patrick.maloney@lead-talent.co.uk

Continue Your Leadership Journey

If you found this article useful, you may also be interested in:

Or contact the Lead Talent team to discover how we can help you, your managers and your future leaders unlock their full potential.