Workplace sabotage doesn’t always look like a dramatic confrontation. More often, it’s subtle — so subtle that you might not recognize it until the damage is already done. Coworkers who undermine you rarely announce their intentions. Instead, they chip away at your credibility, opportunities, and confidence through behaviors that are easy to dismiss as coincidence or misunderstanding.

They Withhold Information

One of the most common and insidious forms of undermining is information hoarding. If a coworker consistently “forgets” to loop you into important emails, doesn’t share updates from meetings you couldn’t attend, or gives you incomplete information for projects you’re working on together, it may not be accidental. When you’re the last to know, you’re always a step behind — and that’s exactly the point.

They Undercut You in Front of Others

This can be as blatant as contradicting you in meetings or as subtle as a raised eyebrow when you’re presenting. Undermining coworkers might frame their disagreements as “just playing devil’s advocate” or offer backhanded compliments that make you look inexperienced. The effect is the same: your ideas and credibility take a hit in front of the people who matter.

They Take Credit for Collaborative Work

When a project succeeds, they position themselves as the driving force. When it fails, suddenly it was your responsibility. This selective ownership is a hallmark of undermining behavior. Watch for colleagues who present shared work as individual achievements or who frame the narrative around their contributions while minimizing yours.

They Befriend Your Boss a Little Too Strategically

There’s nothing wrong with having a good relationship with your manager. But if a coworker seems unusually focused on cultivating that relationship — especially while subtly steering conversations about your performance or reliability — the dynamic might be more calculated than it appears.

How to Respond

The most effective countermeasure is visibility. Make your contributions undeniable by documenting your work, communicating your progress directly to stakeholders, and building your own relationships with leadership. Don’t isolate yourself or retreat — that’s exactly what undermining is designed to make you do. Instead, engage more, contribute more visibly, and maintain your professionalism even when it’s frustrating. Over time, consistent excellence speaks louder than office politics.