How to spot toxic employees before you hire them


Interviewers and hiring managers need to “be on the lookout for signs of civility,” as leadership expert Christine Porath puts it. Ask candidates about previous experiences rather than engaging them in hypotheticals. So, for instance, rather than asking someone how they would handle a difference of opinion with a co-worker, ask for specific examples of how they’ve resolved conflicts in the past.

Most people, especially seasoned candidates, come to interviews having prepared a stock answers. When you ask a question, don’t settle for a rehearsed or overtly trite response. Ask for multiple examples of how they handled different personalities and dynamics in the workplace. By asking them to dig deep, you’re likely to get answers that are more honest, more spontaneous, and more indicative of their potential for toxicity.

Some of these questions may seem unconventional, but they’re designed to predict whether an employee will be a positive addition to a team or whether they’re more likely to cause problems.

Try asking:

  • What would you change about your previous job?
  • What would your former employers say about you? List some positives and negatives.
  • What has been your biggest professional success so far, and how did you achieve it?
  • Talk about some instances when you had to manage stress at work. What did you do?
  • Discuss a few times when you found it difficult to work with someone. How did you approach the situation?

No workplace is perfect, and many of these questions require candidates to speak to the negatives. Ideal candidates, however, will present problems without pointing fingers at people, shaming others, or playing the victim. Candidates who complain or gripe about their supervisors, co-workers, or direct reports are likely to exhibit similar toxic qualities in other contexts.

Sometimes, it comes down to a gut feeling. If you’re interviewing someone and feel unsure about them, call their references. You can also call people they supervised, or people in your network who may be mutually connected. Have them interview with colleagues with whom they’ll be working or even spend a day around the office to get a feel for how they mesh with the rest of the team. If your gut feeling is confirmed, the extra mile was worth it.

The importance of psychological safety

In an age where innovation is essential to thrive, you can’t afford to have a team that’s fearful of open communication, vulnerability, and healthy conflict. After all, some degree of friction is needed to spark growth.

Prioritizing psychological safety—assuring employees can take risks without feeling insecure, embarrassed, or criticized—is the most important attribute a team can have. But once a toxic employee joins the ranks, it’s very hard for people to do their best work.

It’s the responsibility of leaders at companies to screen for toxicity when hiring and build psychologically safe workplaces. When they do this successfully, good employees are more likely to stay, grow, and take risks, which propels everyone forward.

Melody Wilding is a high-performance coach, writer, and speaker