The new hire’s mentor: how to choose one and what to ask of them
Echipa HR 365 · reviewed 2026-09-11 · 5 min read
The most common defect is not the absence of a mentor, but the existence of one who does not know they are a mentor, has no time allocated, and was never told what is expected. The result is that the new joiner asks the manager everything, and the mentor finds out about their role only when somebody complains they did not fulfil it.
Who you choose
Not the best professional, and not the least busy one. The criteria that matter are different, and easy to check:
| Criterion | Why it matters | How you check it |
|---|---|---|
| Does that work daily | Explains from practice, not from memory | Obvious from the role |
| Has been here 1-3 years | Remembers what they did not know; ten-year veterans have forgotten | Tenure |
| Answers questions without seeming put out | The one quality that cannot be learned quickly | Do colleagues already ask them? |
| Is not overloaded this month | Mentoring takes real time, not goodwill | Their current workload |
The role description: six tasks
What being a mentor actually means
- Day 1 — you receive them, show them the place, have lunch with them; you, not the manager
- Week 1 — you block two hours a day when you are available for any question
- Weeks 2-4 — you let them shadow you on the main workflow and explain why, not just how
- Weeks 2-8 — you check their first pieces of work before delivery and tell them what you would change
- Weekly, 8 weeks — fifteen minutes: what is unclear, what went well, what comes next
- At 30 and 60 days — you tell the manager what you observed — factually, not as an assessment
The second task is what makes the practical difference. A mentor who is “available any time” is in reality available when they are not busy — and the new joiner quickly learns not to intrude. Two declared hours a day, in the first week, are more useful than permanent theoretical availability.
What a mentor is not
- Not an assessor. What they report to the manager are observations, not ratings; otherwise the new joiner stops asking them anything.
- Not a backup manager. Decisions about tasks, priorities and formal feedback stay with the manager.
- Not responsible for the new joiner’s results. If they are, they will take over the work instead of explaining it.
- Not permanent. The role ends explicitly, at 8-12 weeks, with a closing conversation.
The first point is the most important and the most often broken. The moment the mentor also becomes a source of assessment, the relationship changes: the new joiner starts choosing their questions, and the main value of the role disappears.
What it costs, and where the time comes from
The time of one mentoring period, over eight weeks
An operational role, mentor at an hourly cost of 13 EUR. Estimated from the role description above.
- Week 1: availability and welcome
- 8 h
- Weeks 2-4: shadowing and explanation
- 9 h
- Weeks 2-8: checking the work
- 7 h
- Weekly conversations and reporting
- 3 h
- Total
- 27 h, roughly 350 EUR
Nu intră în calcul:
- the manager’s time, which is separate and does not fall to zero
- short interruptions, impossible to account for and entirely real
Twenty-seven hours looks like a lot until you compare it with the cost of a month’s delayed autonomy — which, for the same role, is more than twice the amount. And the time comes from a specific place: something is taken off the mentor’s plate for that period, or they do both jobs badly.
What the mentor gets
At minimum, explicit recognition that it is a task rather than a favour: it appears in their review, it counts towards workload, and it is said out loud. In many companies, mentoring is invisible work done by the same people, year after year, with nobody ever naming it.
Can one person mentor two people at once?
In practice, not in the same month. The 27 hours double, and the first-week availability becomes impossible for both.
What if nobody wants to?
It is usually not a refusal in principle but a fear that it is added on top of everything else. The right question is not “do you want to be a mentor” but “what do we take off your plate for the next two months”.
Where to start
Check whether the mentors assigned at your last few hires knew they were mentors and what was asked of them. It is a one-minute question and the answer is usually half the explanation for how the integration went.
Then, at the next hire, send the mentor the six-task description and ask them what you should take off their list. That is the conversation that makes the role real.
How the role ends
Mentoring has an explicit ending; it does not fade out. At eight or twelve weeks, a fifteen-minute conversation between three people — mentor, new joiner, manager — covering what was addressed, what is left, and the fact that from now on questions go to the manager.
Without that closing, one of two things happens: either the mentor stays, informally, as the permanent channel for every question — and then the manager never builds the direct relationship — or the support disappears abruptly, leaving the new joiner not knowing who to ask.
The mentor receives their own tasks, with dates, at every hire
The six tasks appear automatically in the mentor’s list, with deadlines — so the role no longer depends on who remembered to tell them.
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