Toxic High Performers and the Hidden Cost to Workplace Culture

The term “soft skills” didn’t start in a corporate training room. It came from the U.S. military. In the 1960s and ‘70s, the Army used it to describe capabilities that had nothing to do with equipment or technical training – capabilities such as leadership, communication, and decision-making under pressure.

Even then, the name “soft skills” was misleading. These weren’t secondary skills but were the difference between having capability on paper and executing it effectively in real-world situations.

You can have the best equipment, the right plan, and highly trained people, but if communication breaks down or priorities aren’t clear, performance suffers. Not because the technical skill isn’t there, but because it isn’t applied well.

Somewhere along the way, workplaces adopted the term “soft skills” and, in the process, missed the point. We separated “hard” results from human behavior, putting them into different categories, and have been evaluating them that way ever since. That’s the mistake. And if you’re leading people, you’ve probably already felt it.

The Toxic "High Performer," The Person Everyone Works Around

You probably know this story…

Someone on your team delivers. Consistently. They hit numbers, close deals, and solve problems faster than anyone else. When things get hard, they’re the first call you make. By every traditional measure, they’re a high performer.

And yet…people hesitate before looping them in. Meetings shift when they join. Feedback dries up. Collaboration quietly shrinks. Nothing is said outright, but the dynamic is clear.

It raises a harder question: Can someone really be a high performer if the way they work makes everyone around them less effective? Most leaders already know the answer. They just don’t act on it.

Outcomes and Behavior Aren’t Separate

We still tend to evaluate the what and the how as if they’re independent.

• What: results, revenue, deliverables

• How: communication, judgment, and how someone behaves under pressure

In reality, they compound each other (both for better and for worse).

Work today is more interdependent than it was even a decade ago. Very little happens in isolation. Which means how someone operates - how they handle conflict, ambiguity, and disagreement - directly shapes the quality and speed of what gets done.

A person who delivers results while consistently creating friction isn’t a high performer with a rough edge. They’re introducing friction into the system. And friction has a cost.

Civility Is a Business Condition, Not a Personality Trait

This is where the conversation usually goes off track. Civility gets mistaken for niceness. For agreeableness. For softness. It isn’t any of those things.

At work, civility means maintaining the conditions where people can think clearly, contribute honestly, and challenge ideas without paying an unnecessary price for it.

In practice, it looks like this:

• Addressing problems directly without weaponizing tone

• Making room for input rather than dominating the conversation

• Disagreeing in ways that actually move things forward

• Managing your own stress without offloading it onto others

When those conditions erode, the impact is real and measurable. Ideas get held back, meetings turn into theater, decisions become narrower. And your strongest contributors, the ones with options, start looking for somewhere else to work.

The Quiet Cost of the Exception

Most organizations make a private calculation at some point: this person produces enough to justify the tradeoff. Short-term, it can seem rational. Long-term, it tends to play out the same way:

• The team learns to work around the person rather than with them

• Behavioral standards become inconsistent, and everyone notices

• High-potential people either adapt downward or leave

• Leadership time gets consumed managing the friction

Net effect: overall team performance declines even as one individual keeps standing out. You’re focusing on one result while the system degrades around it.

Redefining the Standard

If performance is defined by output alone, then behavior is always negotiable. A more accurate definition is performance = results + your impact on the people and systems around you.

That shift forces better questions: Can people do their best work near this person? Does their approach scale, or does it create dependencies and workarounds? Does their presence make the team stronger or more fragile?

This isn’t about personality or “culture fit”. It’s about whether the full picture, not just the headline number, is actually what you want to be rewarding.

How to Make It Real

The goal isn’t to call anyone out. It’s to set a standard that applies to everyone, including, and especially, your top performers.

• Be as clear about behavior as you are about results. Vague expectations become optional ones. Define what effective collaboration, healthy disagreement, and sound judgment under pressure actually look like in your organization.

• Bring behavior into regular performance conversations – not just crisis moments. When it only comes up at a breaking point, it feels personal. When it’s part of the ongoing dialogue, it’s simply how performance is measured.

• Frame feedback around team impact, not character. For example, “That approach tends to close down the conversation before the best ideas surface.” or “You’re driving real results, and we need others to be able to engage in the process, too.”

• Hold the line on consistency. If the standard bends for certain people, everyone sees it. That’s when behavior becomes negotiable by default.

• Recognize what strengthens the system, not just what stands out individually. Acknowledge when someone builds alignment, brings clarity to a tough conversation, or makes others better. Signal what you actually value.

What High Performance Actually Looks Like

A true high performer doesn’t just deliver results. They make it easier for others to contribute. They raise the quality of thinking in the room without lowering the willingness to participate. They build momentum that outlasts their own individual output.

The military understood this decades ago. The most effective operators weren’t just technically skilled; they made the people around them more capable.

Modern organizations are relearning the same lesson.

The what and the how were never two different standards. They were always one. Here are some frequently asked questions about workplace civility:

Can toxic high performers hurt workplace culture?

Yes. Even strong individual performers can negatively impact communication, morale, collaboration, and overall team performance when their behavior creates tension or conflict.

How should leaders handle difficult high performers?

Leaders should address behavior consistently by focusing on accountability, communication, and the impact on the overall team.

Why do employees avoid speaking up at work?

Employees are less likely to contribute ideas or concerns when workplace communication feels unsafe, dismissive, or overly critical.

Why does workplace communication matter?

Clear and respectful communication improves trust, collaboration, employee engagement, and overall workplace culture.