The yellow flags were there from the beginning. In the interviews, he talked more about compensation than vision. There was a subtle pattern of taking credit for team wins. People who had worked with him noticed a certain edge, and there was a competitiveness present on his teams. Some described it as a tendency to pit people against each other.
None of these were disqualifying traits on their own. The hiring team chalked it up to a strong leadership style. He was confident and driven. They brushed the concerns aside and promoted him to the senior leadership role.
How We Talk Ourselves Into It
It seems counterintuitive to hesitate on a high performer. Here is someone who delivers results, who wants the role, who will likely leave if passed over. The reasoning of the hiring team is familiar: give him the bigger stage and he’ll rise to the occasion. The role itself will shape them.
But promotions don’t develop people. They amplify who they already are.
Maybe you have a candidate in front of you right now. They’re a strong performer with clear ambition. But you’ve noticed things. Maybe she doesn’t develop her people. Maybe his direct reports seem tense. Maybe there’s a pattern of conflict that always seems to involve the same person. No one is clearly articulating it, and so there aren’t red flags.
There are yellow flags. What you do with them could make all the difference.
What Happens After the Promotion
In the case I witnessed, the trajectory was predictable in hindsight. The new leader’s first major decision was to fire a long-tenured employee. The dismissal was abrupt, poorly communicated, and created immediate discord. People who had felt secure began updating their resumes. The flags that had been yellow before the promotion didn’t disappear. They deepened.
Over the following months, a pattern emerged. He surrounded himself with people who wouldn’t challenge him. He dismissed feedback from experienced colleagues. The analytical gaps that had been overlooked became more consequential as decisions got bigger. Senior people, the ones with options, started leaving. Not in protest. Quietly. They simply found other opportunities and took them.
The culture shifted. People held sidebar conversations about what was really happening. Meetings became performances and good work took a backseat to political navigation. Within three years, the organization had lost multiple senior leaders, project performance had eroded, and the margins that had seemed stable were under pressure.
They’ll say the situation was unique, an extreme case, and won’t happen again. They’ll say most promotions don’t go this badly. That’s true. But the pattern is the same, even in smaller doses. Yellow flags that aren’t addressed before a promotion become harder to address after. The person now has more authority, more visibility, more organizational stake in defending how they operate. And the people around them have less leverage to push back.
The Real Cost
The cost of these promotion decisions isn’t just the failed leader. It’s the good people who leave before you act. The senior project manager who sees what’s happening and decides the organization is no longer a place worth investing in. The high-potential engineer who quietly takes a call from a competitor. The people with options exercise them first.
By the time the problems become undeniable, the damage is compounding. You’re not just dealing with one underperforming leader. You’re dealing with a weakened team, eroded trust, and departed talent that took institutional knowledge with them.
What This Means For You
When you have a promotion decision in front of you, articulate what you’ve noticed. Talk to others and listen to what is being said beneath the words. Identify the yellow flags that aren’t being said out loud.
Don’t ignore those and hope the role will do the work of developing them. It won’t. The role will give them more scope to be who they already are.
Instead, get specific about what you’re seeing. Name the behaviors. Have the development conversations before the promotion, not after. If the concerns are real, address them as conditions for advancement. If they’re not addressable, that’s information too.
Yellow flags don’t turn green with a title change. They turn red. The only question is how much it costs you to find out.