We keep doing it. Someone is brilliant at the technical work. The best engineer. The sharpest accountant. The lawyer who never loses. The salesperson who smashes every target. So we promote them.
Into a job that isn’t technical at all. Leading people is a whole-human job. And we keep filling whole-human jobs with half a human — the head without the heart, the expertise without the regulation, the brilliance without the spine.
Then we act surprised when it goes wrong.
The promotion trap
Here’s the uncomfortable truth about how most organisations promote. We promote for competence in the last job. Not capability for the next one.
Think about how the decision actually gets made. Someone resigns, or a team grows, a role opens up, and the leadership team looks around the room. Who’s the strongest performer?
Who knows the work inside out? Who’s been here longest? Who would be offended if we passed them over? Notice what’s missing from every one of those questions.
Not one of them asks whether this person can lead a human being. The last job rewarded technical mastery. Output. Being the smartest person on the problem.
The next job requires something completely different: reading a room, having the hard conversation, staying steady when everything is on fire, and making people feel safe enough to tell you the truth.
Gallup has been telling us for years that organisations get their manager choices wrong far more often than they get them right — and that the manager is the single biggest factor in whether a team is engaged or checked out. We know this. The research isn’t new.
We just keep ignoring it. Because technical brilliance is easy to measure, and human capability is not. So we measure what’s easy. And we promote what we measure.
I’ve watched this movie hundreds of times. After nearly two decades running leadership programs, I can tell you exactly how this plays out. I’ve sat across from the fallout more times than I can count.
A construction firm promotes its best project engineer to lead a team of twelve. Within six months, three of the twelve have resigned. Not because he’s cruel. Because every conversation feels like an audit. He reviews their work the way he used to review drawings — looking for errors — and never learned there’s a difference between checking a drawing and checking a human.
A professional services firm promotes its top biller. She’s extraordinary with clients. But she’s never once had to deliver hard feedback, and she can’t bring herself to start now. So problems fester. The underperformer stays. The high performers watch the underperformer stay, do the maths, and leave.
A government agency promotes the person with the deepest policy knowledge. He knows everything and delegates nothing, because handing over the work feels like handing over his identity. His team stops growing. Then they stop trying.
Different industries. Same story. Nobody in these stories is a villain. Every one of them was set up to fail — handed a whole-human job without anyone checking whether the whole human was ready. Most of them were never even told the job had changed.
What actually breaks
Watch what happens when a technically brilliant, emotionally underdeveloped leader takes over a team. The team stops bringing problems early. Because problems get met with irritation, not curiosity. And here’s the expensive part: problems don’t disappear when people stop raising them. They just go underground, compound quietly, and surface later as crises.
The best people go quiet. Then they go elsewhere. And they don’t tell you the real reason in the exit interview, because the real reason is sitting in the room. Meetings become performances. Everyone manages the leader’s moods instead of doing the work. Enormous amounts of energy — energy you’re paying for — gets redirected into reading one person’s face.
And the leader? They work harder. More hours. More control. More detail. Because the only tool they were ever given was technical excellence — so they apply more of it and wonder why the team keeps getting worse. They end up exhausted, isolated, and quietly wondering if they’re failing. Often they are the last person anyone tells the truth to.
Add it up. Regretted attrition. Disengagement. Slow decisions. Buried problems. A leader burning out in real time. That’s the actual price of promoting half a human — and almost none of it shows up on a spreadsheet until it’s too late to be cheap.
This is anatomy, not personality
Here’s where the neuroscience matters. A leader who can’t regulate under pressure isn’t weak. Their nervous system is doing exactly what nervous systems do — scanning for threat, flooding the body with cortisol, pulling blood away from the thinking brain right when the thinking brain is needed most.
That’s hardware, not character. But here’s the thing about leadership: your nervous system is contagious. An unregulated leader floods a room with threat. And brains under threat can’t think clearly, can’t create, and won’t tell you the truth. Psychological safety isn’t a poster in the lunchroom. It’s a biological state — and the leader’s state sets it.
That’s not a culture problem. That’s biology. This is why I built the Human Leader Model around the body, not around a personality test.
Six zones:
- A regulated head — because nothing good happens through an unregulated leader, and regulation comes before courage, before strategy, before everything.
- A kind heart — because connection isn’t soft. It’s the mechanism through which people feel safe enough to do their best work.
- A wise gut — because instinct without practice stays fast and never gets wise. A trained gut is a leadership asset. An untrained one is just a mood with confidence.
- A brave spine — because character is what holds you upright under load. The hard conversation. The unpopular call. The truth told to the room that doesn’t want it.
- Hands that serve — because leadership is what you actually do with all of it. Intentions don’t lead teams. Actions do.
- A footprint that lasts — because the real measure of your leadership is what remains where you stood, long after you’ve moved on.
Now look at that list again. Technical brilliance doesn’t appear anywhere on it. Not because it doesn’t matter — it does. But it’s the price of entry, not the job.
The job is the human.
What to do instead
If you’re in HR or on an executive team, five things. Promote for the next job, not the last one. Before anyone steps into leadership, ask one question: can this person stay regulated, kind, and honest when it’s hard? If you don’t know the answer, you’re not ready to make the promotion. Go find out first.
Build the human capability before the title. Regulation, courage, and connection are trainable. The brain is plastic — that’s not a metaphor, it’s a fact. But most organisations develop leaders after promoting them, which is like teaching someone to swim after throwing them in. Move the development upstream. Build the human first.
Make the human criteria explicit. If your promotion framework lists technical competencies in detail and covers the human side with a vague line about “people skills,” you’ve already made the decision. What gets specified gets selected for. Write the whole human criteria down with the same rigour you’d apply to technical ones.
Stop punishing the ones who tell you the truth. Some of your best technical people know they don’t want to lead humans — and that self-awareness is worth its weight in gold. Give them a senior path that doesn’t require people leadership. A brilliant engineer forced into managing humans is two failures for the price of one: you lose a great engineer and gain a struggling leader.
Check on the ones you’ve already promoted. Somewhere in your organisation right now is a technically brilliant leader who is drowning and hiding it well. They don’t need a performance conversation. They need development, support, and permission to be a beginner at the human part. Go find them before their team finds the exit.
The bottom line
Great leaders are great humans first. Not great technicians who picked up some people skills on the way through. Humans first. The technical part was never the hard part.
Every organisation says people are its greatest asset. Then it hands those people to leaders chosen for everything except their ability to lead people. You can’t have it both ways.
So next time a promotion decision is on the table, ask the real question. Not “are they brilliant?”
Ask: “are they whole?”
By Sonia McDonald is the Founder and CEO of LeadershipHQ and creator of the Human Leader Model™. Her new book on leading as a whole human is coming soon.
Want to Go Deeper?
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