Performance vs Leadership Readiness Dr. Mathew Thomas

Your Best Employee May Not Become Your Best Leader | Dr. Mathew Thomas

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Your Best Employee May Not Become Your Best Leader | Dr. Mathew Thomas

The Promotion That Looked Obvious — and Went Wrong

Your highest-performing employee has exceeded every target. They know the business. They solve problems faster than most. They are dependable, ambitious and consistently deliver.

A leadership position opens up. The decision seems obvious: promote them.

Six months later, the same person who once lifted performance is struggling to manage a team. They step into every problem themselves. Delegation feels uncomfortable. Feedback becomes directive. Team members stop taking initiative. Good people begin disengaging.

What went wrong? Perhaps nothing went wrong with the employee. Perhaps the organisation simply promoted someone for being excellent at one job without sufficiently assessing whether they were ready for a fundamentally different one. That distinction matters — and it is one of the most common blind spots covered in leadership training programmes in Mumbai and across India.

The Promotion Paradox

Organisations naturally look toward their strongest performers when leadership opportunities emerge — and there is logic in doing so. Strong performance demonstrates competence, commitment, accountability and an ability to deliver results. These are valuable qualities in a leader. But they are not the same as leadership readiness.

An individual contributor is largely rewarded for what they can accomplish. A leader is increasingly judged by what they enable others to accomplish. That shift — from personal performance to collective performance — is one of the most significant transitions in professional life.

Yet organisations frequently treat promotion as a reward for past performance rather than an assessment of capability for the next role. This echoes the idea behind the Peter Principle: people in hierarchical organisations may continue to be promoted based on success in their current roles until they reach a position requiring capabilities they have not yet developed. It is not an inevitable law of organisational life, but it highlights a very real risk — success at one level does not automatically predict success at the next.

Why Performance Does Not Guarantee Leadership

Consider a technically outstanding sales professional. For years, success may have depended on personal drive, customer relationships, negotiation skills and the ability to close difficult deals. Then that person becomes a sales manager, and suddenly the job changes.

They must coach an underperforming salesperson instead of taking over the account. They must allow someone else to handle a negotiation differently from how they would handle it. They must give developmental feedback, manage disagreements, distribute opportunities fairly and make decisions that may not make everyone happy. Most importantly, they must learn to resist the temptation to become the team’s best salesperson.

High performers often build their success through control, expertise and personal accountability. Leadership asks them to relinquish some of that control. They must move:

  • From doing to enabling
  • From knowing to asking
  • From solving to coaching
  • From individual recognition to shared credit
  • From personal standards to developing capability in others

A technically brilliant employee may think, “It will be quicker if I do it myself.” They may even be right. But if the leader continually does the team’s work, the team never develops. Leadership effectiveness therefore requires capabilities that may never have been seriously tested in the employee’s previous role: communication, emotional intelligence, self-awareness, judgment, adaptability, delegation, coaching, conflict management and the ability to build trust — the exact capabilities built through structured leadership coaching and mentoring.

The Hidden Organisational Cost

A poor promotion decision does not affect only the newly appointed manager. The consequences spread. Employees working under the new manager may experience micromanagement, unclear expectations or insufficient development. Strong team members may become frustrated because they are not trusted with meaningful responsibility. Others may become dependent on the manager because every difficult problem eventually gets escalated upward.

Conflict may remain unresolved. Decisions slow down. Initiative declines. Eventually, valuable employees may leave. And there is another cost organisations sometimes overlook: they may lose an exceptional individual contributor while gaining an ineffective manager. The person who once created enormous value through expertise may now spend most of their time performing work they were never properly prepared to do.

This is why promotion decisions should not be viewed merely as career rewards. They are organisational design decisions.

What Organisations Often Get Wrong

The problem is not always the employee. Organisations themselves often create the conditions for unsuccessful leadership transitions. One major reason is the absence of credible career paths for specialists. If increased compensation, recognition and status are available primarily through management positions, ambitious high performers may feel compelled to become managers — even when their greatest contribution lies elsewhere.

Another problem is urgency. A leadership vacancy appears. Someone must fill it quickly. The strongest performer becomes the easiest choice. Then comes a dangerous assumption: “They know the work, therefore they can lead the people doing the work.”

Organisations may also provide extensive technical development throughout someone’s career but surprisingly little preparation for the moment they become responsible for people. A new manager is given a team on Monday and expected to “lead” by Tuesday. This is not simply a talent problem. It is a leadership-transition problem.

A Better Way to Identify Future Leaders

Before promoting someone, organisations should distinguish four things:

  • Technical competence: Can this person perform the work exceptionally well?
  • Leadership potential: Do they demonstrate qualities that could enable them to lead effectively?
  • Leadership readiness: Are they currently prepared to take responsibility for people and performance?
  • Leadership effectiveness: Once placed in leadership, can they consistently create results through others?

These are related — but they are not interchangeable. Imagine two high performers. The first consistently delivers outstanding individual results but protects knowledge, becomes impatient when colleagues struggle and prefers completing important tasks personally. The second also performs strongly, but colleagues naturally approach them for guidance. They explain rather than simply correct. They share information, invite different perspectives and help others improve.

Both employees may be valuable. But the second is already demonstrating behaviours relevant to leadership — even without the title. Organisations should therefore look beyond output and ask: how does this person affect the performance of people around them?

Leadership readiness should also be tested rather than assumed. Give potential leaders stretch assignments. Let them lead a cross-functional initiative. Ask them to mentor a colleague. Allow them to facilitate a difficult meeting. Give them temporary responsibility for a project team. Collect feedback from people who work with them. Observe what happens when they cannot rely solely on technical expertise.

A Practical Leadership-Readiness Checklist

Before promoting a high performer, decision-makers should stop asking only “how well is this person performing?” They should also ask:

  • Can this person achieve results through others rather than doing everything personally?
  • Do colleagues trust them and seek their perspective?
  • Can they give difficult feedback respectfully?
  • How do they respond when someone disagrees with them?
  • Can they delegate important work without constantly taking it back?
  • Do they share knowledge and credit?
  • Can they develop someone whose personality or working style differs from their own?
  • Do they remain thoughtful under pressure?
  • Can they balance empathy with accountability?
  • Are they genuinely interested in developing people — or primarily interested in the status of becoming a manager?

Most importantly: have we observed these behaviours, or are we merely assuming they exist because the employee performs well? That final question can prevent many expensive promotion mistakes.

The First 90 Days Matter

Even a well-selected future leader should not be expected to make the transition alone. The first 90 days should deliberately help the new manager redefine what success means: clarify expectations early, make it explicit that their value no longer comes from personally solving every problem, help them establish relationships with team members, coach them on delegation, provide frequent feedback (not just when something goes wrong), and discuss difficult conversations before they become crises.

Perhaps most importantly, help them become comfortable with a new reality: sometimes the best evidence that a leader is succeeding is that the team can perform exceptionally well without the leader constantly stepping in. This is exactly the transition that structured leadership training and coaching programmes are designed to support.

The Leadership Lesson

None of this means organisations should stop promoting high performers. Many outstanding individual contributors become exceptional leaders. Performance matters. Expertise matters. Credibility matters. And leadership capabilities can absolutely be developed.

The mistake is assuming that high performance alone is sufficient evidence of leadership readiness. Equally, when a newly promoted manager struggles, organisations should resist placing all responsibility on that individual. Unclear expectations, weak onboarding, toxic cultures, insufficient authority, poor resources and lack of coaching can undermine even a promising leader. Leadership success is created by both individual capability and organisational environment.

The better question, therefore, is not “who deserves the promotion?” It is: “Who is ready for the responsibilities of the role — and what development and support will help them succeed?” That small change in question can lead to dramatically better talent decisions.

Frequently Asked Questions

1. Why do good employees often struggle after becoming managers?

Because the skills that made them excellent individual contributors — control, expertise and personal accountability — are different from the skills leadership requires, such as delegation, coaching and developing other people’s capability.

2. What is the Peter Principle?

It is the idea that people in hierarchical organisations may keep getting promoted based on success in their current role until they reach a position requiring capabilities they have not yet developed. It is a useful lens, not an inevitable rule.

3. How can organisations assess leadership readiness before promoting someone?

By testing it rather than assuming it — through stretch assignments, mentoring opportunities, facilitating meetings and collecting feedback from colleagues on how the person affects the performance of people around them.

4. Can leadership capability be developed, or is it fixed?

Leadership capability can absolutely be developed with the right support, structured leadership training and coaching, especially in the critical first 90 days of a new leadership role.

5. What should organisations do in a new manager’s first 90 days?

Clarify expectations early, help them build relationships with their team, coach them on delegation, give frequent feedback, and prepare them for difficult conversations before those conversations become crises.

Closing Thought

Promotion should not simply recognise what someone has already achieved. It should reflect thoughtful judgment about the kind of responsibility they are ready to assume next. Organisations need exceptional performers. They also need exceptional leaders. Sometimes those are the same people. Sometimes they are not. The wisdom lies in knowing the difference.

When your next leadership position opens, will you promote the person with the strongest performance record — or the person who has demonstrated the greatest capacity to make other people stronger?

Dr. Mathew Thomas is a leadership trainer and executive coach based in Mumbai, helping organisations across India build future-ready leaders through structured leadership training programmes and one-on-one leadership coaching. Visit the home page to learn more, or find Mentora India on Google Maps.