Tell me about a time you noticed a teammate's performance slipping and stepped in to support them.

How to answer this behavioral interview question: a complete STAR example, the mistakes interviewers watch for, and the follow-ups you should expect.

A strong STAR example answer

A project coordinator on my team had been reliably excellent for a year, then over the course of a month things changed: she missed two status updates, went quiet in meetings, and shipped a vendor contract with a rare error. Others began grumbling. Because we had worked closely, I felt I could ask directly.

Over coffee away from the office, I said plainly that I had noticed a change and asked if everything was okay. She told me she was going through a difficult family situation and was exhausted, but was afraid of being seen as unreliable if she told our manager. I did not push for details; I asked what would help.

With her agreement, I did three things. First, I encouraged her to talk to our manager, and rehearsed that conversation with her — the manager turned out to be supportive and adjusted her workload. Second, I took over the vendor renewal tracking for the rest of the quarter so her highest-risk responsibility was covered. Third, we set a ten-minute daily check-in. I kept her dignity intact in front of the team; nobody needed an explanation beyond a workload shuffle.

After two months she was back to form, and she later told me the check-ins were what kept her from burning out entirely. The project she had been struggling on finished on time.

How to structure your own answer

• Situation: Describe the signals you noticed and your relationship with the teammate.
• Task: Explain what was at stake for them and the team if nothing changed.
• Action: Walk through how you approached them and the support you actually provided.
• Result: Share how things turned out and what you learned about boundaries and care.

Common mistakes to avoid

• Going straight to the manager instead of talking to the teammate first.
• Prying into personal details or playing therapist rather than colleague.
• Fixing their tasks quietly without ever addressing the root situation.
• Ignoring your own boundaries — taking on their work indefinitely helps no one.

Follow-up questions to prepare for

Interviewers use follow-ups to verify your story is real. If you use this question in a real interview, expect probes like:

• Where is the line between supporting a teammate and enabling underperformance?
• What would you do if they refused your help?
• How did you protect their privacy while explaining the workload change to others?

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