Why Great Employees Don't Always Make Great Leaders

You have an employee who is fantastic at their job. They’re reliable, knowledgeable, customers love them, and they’re the person everyone turns to when something goes wrong. So when a supervisory or management position opens up, promoting them seems like the obvious choice.

Sometimes it is. But being great at the work and being great at leading the people doing the work are two very different things.

Organizations make this mistake all the time. The best technician becomes the department supervisor. The top salesperson becomes the sales manager. The employee who has been around the longest gets responsibility for the team. The person who always gets things done suddenly has people reporting to them.

Then, a few months later, everyone is frustrated. The new manager is overwhelmed, employees complain that communication has gotten worse, problems aren’t being addressed, and senior leaders are still getting pulled into situations the new manager was supposed to handle.

The problem isn’t necessarily that you promoted the wrong person. The problem may be that you promoted someone into an entirely new profession and assumed they already knew how to do it.

Doing the Work Is Not the Same as Leading the Work

High-performing employees usually succeed because they know how to manage their own work. They understand the technical side of the job, they know how to solve problems, and they’ve developed habits that allow them to perform consistently.

Leadership changes the equation.

A manager has to get results through other people. That means communicating expectations, giving feedback, addressing poor performance, coaching employees who are struggling, resolving conflict, making decisions, and sometimes having conversations no one is particularly excited to have.

It also means resisting the urge to solve every problem personally.

That can be especially difficult for someone who earned the promotion because they were always the one who jumped in and fixed things. What made them successful as an individual contributor can actually get in the way once they become a leader.

If the manager keeps taking over every difficult task, the team never develops. If they answer every question, employees never learn to make decisions. If they correct every mistake themselves, they may get the immediate result they want, but they haven’t helped anyone improve.

A manager’s success is no longer measured only by how much they accomplish personally. Increasingly, it’s measured by how well the people around them perform.

The Dangerous Assumption That People “Should Know Better”

One of the biggest traps new managers fall into is assuming employees automatically know what is expected of them.

“They’ve been here long enough.”

“We’ve talked about this before.”

“Everybody knows that.”

“They should know better.”

Maybe they should. But “should know” is a terrible management strategy. If an expectation hasn’t been clearly communicated, reinforced, and followed up on, and there are no consequences for not meeting the clearly communicated expectation, the employee may have a very different idea of what acceptable performance looks like. What seems obvious to the manager may not be obvious at all to the person on the receiving end.

Consider the difference between telling an employee, “You need to be more professional with customers,” and saying, “When you’re explaining a policy to a customer, slow down, explain why the policy exists, and make sure they understand what happens next before wrapping up the conversation.”

The first statement expresses dissatisfaction. The second gives the employee something they can actually change.

Strong leaders learn to replace assumptions with clarity. They stop relying on vague instructions such as “be more proactive,” “communicate better,” or “show more initiative” and start describing the specific behaviors they want to see.

Avoiding Difficult Conversations Usually Makes Them More Difficult

Another challenge for new managers is discovering that leadership sometimes requires saying things people don’t want to hear.

An employee is repeatedly late. Two coworkers aren’t getting along. Someone’s attitude is affecting the rest of the team. A normally strong employee’s performance has slipped. A customer complains about how they were treated.

None of those conversations are particularly appealing, so inexperienced managers often delay them. They hope the problem will resolve itself, the employee will figure it out, or things will improve without anyone having to bring up the uncomfortable subject.

That rarely works.

While the manager is avoiding the conversation, the employee causing the problem may assume everything is fine. Meanwhile, the other employees see what is happening and wonder why management isn’t doing anything about it. Frustration grows, resentment builds, and what started as a fairly manageable issue becomes much harder to fix.

Good leadership doesn’t mean looking for confrontation. It means being willing to address problems while they are still small enough to solve.

Promotions Change Relationships

Promoting from within can create another challenge that organizations often underestimate. Yesterday, the new manager was one of the team. Today, that person may be responsible for evaluating performance, enforcing policies, approving time off, assigning work, or addressing problems involving former peers.

That transition can get uncomfortable quickly.

Some new managers go too far in one direction and become overly authoritative because they feel they need to prove they’re in charge. Others go the opposite way and avoid holding people accountable because they don’t want former coworkers to think they’ve changed.

Neither approach works very well.

A new title does not automatically create leadership credibility. Credibility develops when people see that a manager is consistent, fair, clear, trustworthy, and willing to make decisions even when those decisions aren’t universally popular.

The goal isn’t to stop having good relationships with employees. It’s to understand that the nature of those relationships has changed.

Look for Leadership Potential Before You Promote

Before automatically promoting your strongest employee, look beyond how well that person performs the job they have today. Ask whether they show the skills and behaviors they’ll need in the role you’re considering them for.

Can they communicate clearly when they’re frustrated? Can they listen before jumping to conclusions? Can they give corrective feedback without attacking the person? Can they hold someone accountable even when they like them? Can they coach someone through a problem instead of simply doing the work for them? Pay attention to how they respond when other people struggle. Do they become impatient, or can they explain something in a different way? Can they stay calm when someone else becomes emotional? Do they take responsibility when something goes wrong, or immediately look for someone to blame?

None of these qualities guarantees that someone will become a great manager, but they tell you far more about leadership potential than technical performance alone.

And Then Teach Them How to Lead

Even when you promote the right person, the job isn’t finished. If you move someone into management and never teach them how to manage, you haven’t really set them up for success. You’ve given them a new title, a new set of responsibilities, and a collection of problems they’ve probably never had to solve before, then hoped they’ll figure it out.

Some people will. Many won’t.

Even people with strong natural leadership instincts become better leaders when they’re given practical tools for communication, feedback, conflict, coaching, accountability, and difficult conversations. Those skills can be learned, practiced, and improved.

Technical expertise may make someone outstanding at their profession. Leadership skills help them bring out the best in everybody else.

Organizations need both.

So before you automatically promote your strongest employee into the next management opening, look beyond how well they perform today. Ask whether they have the potential to help other people perform better tomorrow.

And if the potential is there, don’t just give them the title. Give them the skills to succeed in it. And if you don't have a leadership development plan/program, now is the time to start preparing one. Let me know if you need help!