Every bad hire looked fine in the interview.
You're optimistic. The candidate is performing. The pressure to fill the seat is real. So you talk yourself into it. Three months later you're having a tough conversation you could have avoided.
Here's what to look for before you make the offer.
## Vague Work History
Real people have real stories. They remember specific jobs, specific situations, specific tools. When you ask "what did a typical day look like at your last job?" and the answer is a two-sentence non-answer, push.
"Tell me more about that. What specifically were you responsible for? Walk me through how a day actually went."
If they get more vague, that's information. They either didn't do the job they said they did, or there's something about that job they don't want you to know. Either way → you need to know now.
Short, evasive answers about work history are not shyness. They're a pattern.
## No Questions for You
Candidates who have done zero thinking about your company won't ask you anything. They'll nod, smile, and wait for the offer.
A candidate who wants this specific job asks questions. What does the first 90 days look like? How does dispatch work? What's the biggest challenge the team is dealing with right now? What happened to the last person in this role?
Silence when you ask "do you have any questions for me?" means they either didn't think about this until 10 minutes ago, or they're applying to so many places that this conversation is interchangeable with the one they had before lunch.
Both are problems.
## Badmouthing Former Employers
There's a version of this that's fine: "It wasn't a great fit culturally and I needed more stability than they could offer." That's honest.
Here's the version that's a problem: "My manager was terrible, the scheduling was a disaster, the customers were unreasonable, and the pay was a joke."
When everything and everyone else is the problem → you're looking at someone who doesn't own anything. Watch specifically for whether they take any ownership of conflicts. "We had some communication issues" is different from "she had it out for me from day one."
The pattern of blame you hear in that interview is the pattern you'll live with on your team.
## Stories That Change Under Pressure
Ask a follow-up question to almost anything and you can watch whether the story holds up.
"You said you left because of the hours. What were the hours like?"
"You mentioned you managed a small team. How many people?"
"You said the owner and you didn't see eye to eye. What did that look like specifically?"
When a story is real, the details come out. When a story is constructed, the follow-up creates friction. They pause differently. They pivot to something else. The numbers change.
Arriving late without acknowledgment is also a signal. Not a disqualifier by itself.. but if they can't manage a first impression → they'll manage your customers' first impressions the same way.
## They Haven't Done Any Research
"What do you know about us?" is a question worth asking every candidate.
Someone who wants this job looked you up. They know your service area, maybe a few reviews, what you do. Someone who's just filling out forms has nothing.
"I saw you've been around for a while and people seem to like you" is not research. It's a guess dressed up to sound like effort.
The people who look you up are signaling that they're selective. Selective people tend to stay longer when they find the right fit, because they thought about whether it was the right fit before they took it.
## What to Do With This
After every hire that didn't work out, I go back and ask which of these signals were there. In my experience, at least one or two were visible in the interview.. and they got rationalized away.
The reason you rationalize it is usually because you need someone. That urgency is the real enemy. Build your pipeline before you're desperate → you'll make better decisions when it counts.
A bad hire in a field role costs $5,000 to $8,000 when you add up recruiting time, training time, lost productivity, and damage to customer relationships. The interview takes an hour. Spend it well.
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- [How to Hire Fast Without Lowering Standards](/guides/how-to-hire-fast-without-lowering-standards/)