Most job seekers evaluate opportunities by assessing the role, the company, and the compensation. The one variable that has more impact on their daily experience than any of these factors often gets the least scrutiny: the manager they will be working for.

Research from Gallup consistently finds that managers account for at least 70% of the variance in employee engagement scores. The company can be excellent and the role can be compelling, but a toxic or incompetent manager will make both irrelevant within months. Spotting the warning signs before accepting an offer is one of the most valuable skills any professional can develop.

1. The Interview Process Itself Is Data

How a hiring manager runs the interview process tells you an enormous amount about how they run their team. The signals are present from the very first interaction, and most candidates fail to read them because they are focused on performing rather than observing.

Did the manager show up on time? Were they prepared, having clearly reviewed your background before the meeting? Did they listen to your answers, or did they seem to be waiting to deliver their next prepared question regardless of what you said? Were they genuinely curious about you as a person, or did the conversation feel transactional and perfunctory?

These behaviors during the interview are almost certainly the best version of how this manager operates. If they are disorganized, inattentive, or dismissive in a situation where they are explicitly trying to impress you, these qualities will be amplified in the daily reality of working for them.

2. The Questions They Ask Reveal What They Value

Managers who ask primarily about your past failures and how you handled them tend to build cultures of learning and accountability. Managers who ask primarily about your achievements and how you performed against peers tend to build competitive, politically charged environments. Managers who ask mostly about your availability and willingness to work extra hours are communicating what they actually value in their team members.

Pay particular attention to questions that reveal how the manager thinks about their team’s development. A manager who asks what you want to learn and how they can help you grow is giving you concrete evidence of an important orientation. A manager who does not ask any questions remotely related to your development is telling you, implicitly, that development is not how they think about their role.

3. Ask Directly About Their Management Philosophy

One of the most revealing and underused interview tactics is simply asking the manager to describe their management approach. How do you give feedback? How do you handle it when a team member is struggling? What does success look like in your team, and how do you measure it? What do you think your team would say is the most challenging thing about working for you?

Most managers have not been asked these questions directly and will not have prepared answers. Their responses, including the hesitations, the framing, and the examples they choose, are revealing. A manager who describes their feedback approach with specificity and genuine reflection is likely thoughtful about it. A manager who answers vaguely or deflects with platitudes probably has not thought carefully about it at all.

The last question, about what their team finds challenging, is particularly useful. Managers who genuinely lead well tend to answer it with self-awareness and specific examples. Managers who are poor leaders tend to give answers that subtly blame the team for the challenges.

4. Talk to Current and Former Team Members

The most reliable intelligence about a manager comes from the people who have worked for them. This is also the most underutilized source of information in most job searches, because asking feels presumptuous or awkward.

It is neither. Requesting to speak with one or two current team members as part of the final interview stage is entirely reasonable and professionally appropriate. Legitimate hiring managers will welcome it. Managers who resist the request, or organizations that find it unusual, are giving you significant information through that resistance alone.

Former team members, reachable through LinkedIn, are often even more forthcoming than current ones. Ask them specifically: what was this manager’s greatest strength and most significant weakness? How did they handle disagreement? How did they respond when someone made a mistake? What would you tell someone considering joining their team?

5. Watch How They Talk About Their Own Team

In the course of the interview, notice how the manager speaks about their current team members. Do they speak about them with genuine respect and specific appreciation? Do they mention their team’s contributions to outcomes, or do they describe results as primarily their own achievement?

A manager who consistently uses “I” when describing team outcomes and “we” when describing challenges is displaying a classic leadership red flag: taking credit for others’ work and distributing blame downward. The reverse pattern, “we” for successes and “I” when acknowledging leadership failures, is a strong signal of someone worth working for.

Also notice whether the manager speaks about any team members in disparaging ways. A manager who casually criticizes current or former employees to an external candidate is almost certainly doing the same with their team, and will eventually do it with you.

6. The Offer Negotiation Reveals Character Under Pressure

The moment you begin negotiating your offer provides a final and often overlooked diagnostic for the manager’s character. Negotiation involves a degree of conflict, and conflict is exactly where character is most visible.

A manager who responds to a counter-offer with genuine consideration, who explains honestly what is and is not possible and why, who treats the negotiation as a professional conversation between equals, is demonstrating something valuable about how they handle disagreement generally. A manager who responds to negotiation with visible irritation, who makes you feel presumptuous for asking, or who uses pressure tactics to close the conversation, is giving you a preview of how they will respond to any future moment of friction.

7. Trust Your Observations Over Your Enthusiasm

The most dangerous moment in any job search is when you want the opportunity badly enough to rationalize away the warning signs you have observed. The role is compelling. The company is impressive. The compensation is excellent. And there were a few things about the manager that gave you pause, but you talked yourself out of taking them seriously.

This rationalization is the single most common reason talented people end up in toxic reporting relationships they should have avoided. The warning signs were present. The signals were readable. The observer simply chose not to trust their own judgment because the rest of the opportunity was attractive.

Conclusion

A good manager can make a mediocre opportunity genuinely rewarding. A toxic manager can ruin an excellent one. Developing the observational discipline to accurately assess the person you will be working for before committing to work for them is not cynicism. It is one of the most important investments you can make in your professional wellbeing and career trajectory.