HR Advice Hub

Why Great Employees Don't Always Make Great Managers

Promoting a high-performing employee into a management role often feels like the obvious next step. They've consistently delivered excellent work, understand the business and are respected by their colleagues.

But being brilliant at your own job and being responsible for helping other people succeed are two very different things. Many employers have experienced the same situation. Their best employee is promoted because it feels like a natural reward for their hard work, only to discover they struggle with managing people, having difficult conversations or leading a team.

In some cases, the business doesn't just gain an ineffective manager – it also loses an outstanding employee who was happier and more successful in their previous role. That doesn't mean they weren't capable. It simply means management requires a different set of skills.

Being Good at The Job Isn't The Same as Leading The Job

Technical expertise and people management are not the same thing. An employee may excel because they:

• Produce consistently high-quality work

• Meet deadlines

• Solve complex problems

• Have extensive technical knowledge

• Build positive relationships with customers and colleagues

• Work independently with little supervision

A manager's role is different. Rather than focusing on their own performance, they're responsible for creating an environment where others can perform at their best. That means spending less time doing the work themselves and more time supporting, coaching, developing and holding others accountable. For some people, this transition comes naturally. For others, it can be one of the biggest challenges of their career.

The People Management Skills That Great Managers Need

Successful managers are rarely judged by how technically capable they are. Instead, they need strong people management skills, including:

• Communicating clearly

• Delegating effectively

• Giving constructive feedback

• Managing conflict

• Coaching and developing employees

• Setting clear expectations

• Having difficult conversations

• Motivating different personalities

• Building trust within a team

• Making balanced and fair decisions

These skills don't automatically develop through experience in a technical role. They usually require training, practice and ongoing support.

Why Promotion Shouldn't Be Automatic

One of the biggest mistakes organisations can make is assuming promotion is the next logical step for every high-performing employee. Promotion shouldn't simply reward someone's past performance. It should assess whether they're likely to succeed in the responsibilities of the new role.

When employers base promotions solely on technical ability, they risk placing employees into positions that don't play to their strengths. A better approach is to consider both performance and potential.

The Peter Principle

There's a well-known management theory called the Peter Principle, which suggests that employees are promoted because they perform well in their current role until they eventually reach a position where they're no longer competent. While this theory isn't always true, it highlights an important point.

Success in one role doesn't automatically predict success in the next. Promotion decisions should consider whether someone has demonstrated leadership behaviours and management potential, not simply whether they're the highest performer in their current role.

Common Challenges For First-Time Managers

Many new managers experience similar struggles, particularly if they've received little or no management training.

Letting go of the work: Some managers continue doing everything themselves because they're used to being the expert. Instead of empowering their team, they become overwhelmed trying to complete everyone's work. Before advertising a vacancy, ask yourself:

• Is every essential criterion genuinely essential?

• Could any qualifications be replaced with equivalent experience?

• Is the language clear, inclusive and easy to understand?

• Have we avoided unnecessary jargon?

• Does the advert focus on the skills needed rather than describing an "ideal" person?

• Would someone outside our organisation understand the role?

A second pair of eyes can often identify wording that the original author may not notice.

Managing former colleagues: Managing people you've previously worked alongside can feel uncomfortable. Some new managers worry about damaging relationships, making them reluctant to challenge poor performance or address inappropriate behaviour.

Avoiding difficult conversations: Performance issues, sickness absence, conduct concerns and grievances can all feel daunting for someone who's never managed people before. Avoiding these conversations rarely makes the situation easier and often allows problems to escalate.

Becoming everyone's problem solver: Instead of coaching employees to find solutions, some managers instinctively jump in and fix every issue themselves. Although well-intentioned, this can create dependency and prevent employees from developing confidence and independence.

Balancing competing priorities: Many managers are surprised by how much time leadership requires. Supporting employees, planning workloads, attending meetings and dealing with people issues often leaves far less time for technical work than they expected.

Management Is More Than Supervising Work

New managers are often expected to handle responsibilities they've never encountered before, such as:

• Conducting probation reviews

• Managing sickness absence

• Holding difficult performance conversations

• Supporting employee wellbeing

• Managing disciplinary and grievance processes

• Giving constructive feedback

• Coaching and developing employees

Without appropriate training, it's understandable that many first-time managers feel out of their depth. Supporting someone through their transition into management benefits both the individual and the wider organisation.

What Should Employers Assess Before Promoting Someone?

Rather than simply asking who is the best performer, employers should consider whether someone has demonstrated the behaviours needed to lead others. Some useful indicators include:

• Emotional intelligence

• Strong communication skills

• Good judgement

• Accountability

• Resilience under pressure

• A willingness to support and develop colleagues

• The ability to influence others positively

• Openness to feedback

• Calm decision-making

• A collaborative approach

Someone doesn't need to tick every box, but these behaviours often provide a better indication of future management success than technical expertise alone.

Management Isn't The Only Career Path

One reason businesses promote high performers into management is because it often appears to be the only route for career progression. However, not everyone wants to manage people. Some employees gain the greatest satisfaction from becoming technical specialists or subject matter experts. Creating alternative career pathways allows organisations to recognise and reward expertise without assuming everyone wants to become a manager.

This not only helps retain talented employees but also ensures management positions are filled by people who genuinely want to lead others.

Don't Just Promote - Prepare

The best organisations don't simply announce a promotion and hope for the best. Before someone takes on a management role, consider giving them opportunities to build their confidence and leadership skills by:

• Leading projects

• Mentoring or supporting new starters

• Chairing meetings

• Taking on temporary acting-up opportunities

• Shadowing experienced managers

• Completing management training

• Receiving coaching or mentoring

• Having regular check-ins during their first few months

Providing support before and after promotion can make a significant difference to a new manager's confidence and long-term success.

Internal Promotion Is Still Important

None of this means employers should avoid promoting people from within. Internal promotions can be a fantastic way to retain talented employees, recognise potential and demonstrate that career progression is possible within your organisation. Employees who already understand your business, values and culture often have a strong foundation to build on.

The key is not to assume that because someone has been successful in one role, they'll automatically know how to manage people in another. If an employee shows genuine leadership potential, promoting them internally can be an excellent decision. However, they should be given the support they need to succeed, whether that's management training, coaching, mentoring or regular guidance during their transition into the role.

Investing in new managers from the outset benefits both the individual and the organisation, helping them develop the confidence and people management skills needed to become effective leaders.

The Cost of Getting It Wrong

Poor management affects far more than the individual manager. It can contribute to:

• Lower employee engagement

• Increased staff turnover

• Poor performance

• More workplace conflict

• Higher sickness absence

• Reduced productivity

• Lower morale

On the other hand, good managers help create positive workplace cultures where employees feel supported, motivated and able to perform at their best. Investing in good management is one of the most valuable investments an organisation can make.

Need HR Support?

Promoting your best employee isn't necessarily the wrong decision, but it shouldn't be an automatic one. Great employees don't always make great managers because the skills required are different. Technical expertise may help someone excel in their own role, but management is about helping other people succeed.

By assessing leadership potential alongside performance, supporting internal talent and investing in management development, employers can make better promotion decisions while giving new managers the best possible chance of success. Promoting from within remains one of the best ways to develop future leaders – provided employees are given the right support as they transition into management.

At BloomHR, we help organisations make confident promotion decisions and support new and existing managers through practical HR advice, management coaching and tailored manager training. If you're preparing someone for their first management role or looking to develop stronger leaders within your business, we'd be happy to help. Contact us for more information.