Why Your Best Employee Becomes a Struggling Manager.

Every org chart is haunted by a rule Laurence Peter named in 1969: in a hierarchy, people tend to rise to their level of incompetence. Someone excels in a role, gets promoted for it, and keeps rising until they reach a job they are not equipped for, where they stall. Nowhere is the Peter Principle more visible than the jump from individual contributor to manager. We promote the best engineer or the top salesperson, then expect judgment, communication, and the ability to have hard conversations to appear overnight. They rarely do, and a strong individual becomes a struggling first-time manager.

But the Peter Principle is a training failure, not a law of nature, and training failures can be fixed. RCM ThinkLabs (rcmlabs.io) gives first-time managers a daily, risk-free place to practice the hard calls before they face them for real, so the promotion comes with the skills it requires. Up to fifteen minutes a session inside a serious game, each new manager rehearses the difficult conversation, the ambiguous decision, the moment that needs a steady hand. The method behind those reps comes out of game-theory research at MIT with Prof. Muhamet Yildiz and the behavioral-science work of learning scientist Karl Kapp.

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The promotion mechanism behind the Peter Principle

The mechanism is simple and almost universal. Organizations promote based on performance in the current role, not on evidence of the skills the next role needs. The two are different: being an excellent individual contributor says little about whether someone can lead. Research on the principle has borne this out. A study of sales organizations found that the best salespeople were the most likely to be promoted and among the most likely to underperform as managers, precisely because the skills do not transfer. The fix is not to stop promoting good people. It is to give them the manager’s skills, through practice, before and as they step up.

The problem with how we make managers

Knowing this, most organizations reach for the usual fix, and it makes things worse: a two-day management course teaches people about management without ever letting them practice it. They return to their team having watched slides, and the first real hard conversation is still the first.

Practice the call before the call

Skill comes from reps, not from information. A first-time manager needs to make the tough decision, get the consequence, and do it again, many times, in a setting where a mistake costs nothing. That is what a daily microlearning session provides: a low-stakes flight simulator for judgment. By the time the manager faces the real conversation, they have already had a version of it a dozen times. A participant who has led teams for more than a decade described the difference this way:

“This is the way training should be. It is much more engaging. It keeps me coming back, with or without the requirement. It doesn’t feel like training.”

Participant · user experience designer

The reaction is common because the format is practice, not a lecture, which is where durable skill actually comes from. It also solves the quiet problem with most manager training, that people do the minimum to complete it. When the reps are engaging, new managers come back on their own.

Two ways to train a first-time manager

Give new managers the reps

A new manager will make hard calls whether or not they are ready. The only real question is where they practice them: on their team, for real, or in a daily game where a mistake teaches instead of costs. Up to fifteen minutes a session is a small price for a manager who has already rehearsed the moment that used to catch them flat.

Common questions

Why do great individual contributors struggle as managers? The two roles need different skills. People are promoted for excelling at individual work, then handed a job that requires judgment, communication, and hard conversations, none of which the previous role tested. A strong contributor becomes a struggling first-time manager not from a lack of talent but from a lack of practice at the manager’s calls.

What is the Peter Principle and how does it happen? Named by Laurence Peter in 1969, it is the tendency for people in a hierarchy to rise to their level of incompetence. Someone excels in a role, gets promoted for it, and keeps rising until they reach a job they are not equipped for, where they stall. It happens because organizations promote on performance in the current role, not on evidence of the skills the next role needs.

What skills does a first-time manager actually need? The hard, human calls: having the difficult conversation, making the ambiguous decision, and holding a steady hand in the moment that needs one. These are judgment and communication skills, exactly the ones that being an excellent individual contributor never tested.

How do you train a top performer to manage their former peers? By giving them reps before the real moment. RCM ThinkLabs puts first-time managers inside a daily session where they rehearse the difficult conversation and the ambiguous call in a low-stakes setting, so by the time they face the real thing with a former peer, they have already had a version of it many times.

How is managing people different from being the best on the team? Being the best on the team is individual work; managing is about judgment, communication, and the ability to have hard conversations. Excelling at the first says little about the second, which is why the best salesperson or engineer is often the most likely to be promoted and among the most likely to struggle as a manager.

Can you develop management skills before the promotion? Yes. Because the Peter Principle is a training failure rather than a law of nature, the manager’s skills can be built through practice before and as someone steps up. RCM ThinkLabs uses daily micro-sessions, fifteen minutes inside the narrative, so the promotion arrives with the skills it requires instead of the gap it usually exposes.