You’ve likely worked hard to shape your company culture—values, behaviours, norms, and trust built over years. But what happens when a high-performer starts pulling against that current? It’s a challenge many senior leaders face. You want results, but you also want a collaborative, respectful culture. When those come into conflict, the cost is usually paid by your team.
This article explores what senior leaders must do when high-performers undermine culture. We’ll look at how to approach the issue through the lens of collaboration, not just performance management.
The Real Cost of High-Performers Who Break Culture
High-performers who deliver strong business results often get more slack. But when they erode team trust, disrupt collaboration, or create fear, their net contribution drops. Sometimes sharply.
It often starts subtly. They may withhold information or control access to resources. They speak over others or dismiss input in meetings. They ignore shared goals in favour of personal wins. Over time, they breed resentment, disrupt alignment, and create silos.
On paper, their KPIs look fine. But behind the scenes, the team avoids them. Meetings are tense. People disengage. Some leave. Productivity stalls—and so does your credibility as a leader.
You may be unintentionally rewarding the wrong behaviours.
Collaboration Is Culture
Culture isn’t about slogans or offsite retreats. It’s about how people work together every day. Collaboration is the most visible indicator of culture in action. And collaboration isn’t about being agreeable—it’s about creating better outcomes through shared effort and respectful challenge.
In healthy environments, people share credit, seek diverse input, and support one another’s growth. They disagree constructively and help each other win. When collaboration is missing, culture suffers. One person can tip the balance and shift team norms, fast.
This is why addressing the behaviour of a disruptive high-performer isn’t a side issue—it’s core to leadership.
What Senior Leaders Must Do
Separate Performance From Behaviour
The first step is to reconsider how you define performance. If you’re only looking at revenue, speed, or technical output, you’re missing half the picture. Behaviour matters just as much.
You need to assess results and behaviour as two distinct but interdependent elements. Ask whether the person is hitting individual goals and solving the right problems. But also ask how they’re contributing to team trust, decision quality, and organizational learning. Are they modelling your values? Do others trust and want to work with them?
You can’t manage culture effectively if you treat results and behaviour as separate categories.
Confront the Cultural Damage Directly
It’s easy to frame the problem as a “communication issue” or to avoid naming what’s really happening. That doesn’t work. You need to call out the disconnect between behaviour and the culture you’re trying to build. Be clear and specific.
For example, instead of saying, “Your tone isn’t great,” say, “You’re producing strong sales results, but several colleagues say you’re withholding pipeline information that affects their ability to plan. That’s not how we work here.”
Don’t let performance become a shield. If a behaviour wouldn’t be acceptable from someone else, it shouldn’t be acceptable here either.
Reset Expectations Around Collaboration
If you’ve never clearly stated what good collaboration looks like in your organization, now is the time. Saying “be a team player” isn’t enough. You need to define expectations.
This means being clear about how people are expected to share knowledge, participate in decisions, respond to peer input, and support others’ growth. It also means tying these behaviours to performance reviews, compensation, and promotion pathways. Collaboration should be non-negotiable, not a bonus.
Support Repair—But Don’t Tolerate Evasion
Some high-performers will adjust when you hold up the mirror and provide a way forward. They may not have realized the impact of their behaviour, or they may have lacked support to shift their style. Coaching and mentoring can help.
But if they dismiss feedback, blame others, or give superficial compliance, you need to make a call. Are they genuinely committed to change, or just trying to keep their status? What message are you sending to others by keeping them? And if a less-tenured employee behaved this way, would you tolerate it?
Consistency is what builds cultural integrity.
Model Collaborative Leadership Yourself
The behaviour you tolerate, you encourage. If you avoid difficult conversations, prioritize output over team health, or reward individual heroics over shared wins, you’re setting a tone. People watch what you do more than what you say.
If, on the other hand, you ask for feedback, admit mistakes, and prioritize team success over ego, you’re making collaboration part of the fabric of leadership. That kind of leadership has ripple effects.
Collaborative leadership isn’t about being soft. It’s about being disciplined in how success is achieved.
Bottom Line
When high-performers undermine culture, you face a choice: protect short-term results, or protect long-term trust. You can’t do both.
Culture isn’t a nice extra. It’s what keeps your organization cohesive, adaptive, and ethical. If you don’t defend it, no one else will.
Start by redefining what high-performance actually means in your context. Hold people accountable for how they achieve results—not just the results themselves. And remember, your silence will always be interpreted as permission.
Want a collaborative, respectful culture? We can help Schedule a call or video conference with Kyle Kalloo or call us right now at: 1-844-910-7111
