Mentoring a junior colleague in a small company: one hour a fortnight, what to cover and how to know it works

In a small company, a junior colleague often learns whatever happens to cross their desk. Someone answers a question when they have a minute. A mistake gets corrected in passing. After a year the person may be useful, but the owner cannot say what they have learned, what they are ready for next, or why one skill is still missing.

A mentoring routine fixes this without a programme or a budget. It is one hour every two weeks, a short list of goals and a check after three months.

What mentoring is, and what it is not

Mentoring is a regular conversation between a more experienced person and a less experienced one, aimed at the junior's development. It is different from three things that often get mixed with it:

• Day-to-day instructions. "Please send this by noon" is management. It happens as the work happens.
• A status meeting. If the hour is spent on open tasks, it has become a project meeting. Keep that separate, for example in a regular one-to-one with each team member, which is about work and problems.
• Onboarding. The first days are covered by a day-by-day plan for the first week. Mentoring starts after that and runs for months, not days.

The CIPD describes coaching and mentoring as support for a person's learning and development, with the mentor usually sharing their own experience and knowledge. That is the useful idea: the mentor is not there to assign work, but to help the junior make sense of it.

Choose the mentor

In a team of five to twenty people you will not have many candidates. Three rules help.

1. Close enough to the work. The mentor should do, or recently have done, work similar to what the junior needs to learn. A senior who has not touched the tool for years gives general advice.
2. Preferably not the line manager. A junior will say "I did not understand that" more easily to a colleague than to the person who decides their pay. If the owner is the only option, say openly that the hour is for learning, not for assessment.
3. Willing, with time. One hour a fortnight is about two per cent of a working month. Tell the mentor that this time is protected and count it as work, not as something done after hours.

If nobody fits, a mentor from outside the company, such as a former colleague or someone from a local business network, can work for a smaller number of sessions. Agree who pays for their time before you start.

Agree three goals for three months

At the first session, write down three goals. Not ten. Each should be something you could check in three months.

Good goals are concrete and small:

• "Prepare and send a customer quotation alone, with review only afterwards."
• "Learn the basics of our accounting tool well enough to enter and check the month's invoices."
• "Run a short customer call with a written summary within one working day."

Weak goals are vague: "be more confident", "learn the business". If a goal is like that, ask: "What would we see if this had happened?" and write down the answer.

Keep the goals on one page, with the date, the names of both people and one line for each goal about why it matters to the company. Both of you keep a copy. A skills grid for cross-training is a good source of goals, because it shows which skills the team is missing.

The hour itself

Hold it every second week, at the same time, away from the desk if you can. Cancelling should be unusual; if the first two sessions slip, the routine usually dies. Use the same four questions each time.

1. What happened since last time? Let the junior talk first. You are listening for what they noticed, not for a report.
2. What was hard or unclear? This is the most valuable part. Ask about a specific moment, not "any problems?". For example: "Which email took you longest to write, and why?"
3. What will you try next? One or two things, small enough to do in two weeks. The junior proposes; the mentor adjusts.
4. What do you need from me or from the company? Access to a tool, an introduction, a day shadowing a colleague. If it is a request for the owner, the mentor passes it on the same week.

Spend the last five minutes writing three lines: what was discussed, what the junior will try, and anything the mentor promised. The junior can write them. The notes stay between the two of you unless you agree to share something; a mentoring hour that is reported to the owner in detail stops being honest.

What the mentor does and does not do

The mentor shares examples from their own work, including mistakes, asks questions before giving answers, and points to where to look. The mentor does not do the junior's tasks, take over a customer relationship, or turn the hour into a review of performance. If a serious problem comes up, such as conduct, safety or a personal difficulty, the mentor says plainly that it has to be handled with the manager and does not promise secrecy. Acas publishes guidance for employers on handling such matters fairly.

Check after three months

Put the date in the calendar at the start. The check takes about forty minutes and has three parts.

• Goals. Go through the three goals. For each: done, partly done, or not started. Give one example of something the junior now does without help.
• Junior's view. Ask: "What was most useful? What was a waste of time? What should change?" Take the answers seriously, even if they are about you.
• Decision. Choose one of three: continue with new goals, change the focus or the mentor, or stop because the junior no longer needs it. Stopping is a good result if the goals were met.

It works if you can name something that is different in the daily work: fewer corrections on a task, a task handed over for good, a customer who now asks for the junior directly. If you cannot name anything after three months, the problem is usually vague goals or missed sessions, not the person.

Common mistakes

• Using the hour for urgent work. When a deadline is near, the first thing cancelled is mentoring. Move it by a day instead of dropping it.
• Too many goals. Three is enough. A longer list is never read again.
• The mentor talks most of the time. Aim for the junior speaking more than half of the time.
• No follow-through. If the mentor promises an introduction or access and nothing happens, the junior learns that the hour does not matter.
• Mixing in assessment. Pay and promotion decisions belong in a separate conversation.

Where AI can help, and where it should not

An AI assistant can help the junior prepare: summarising a long document before the session, suggesting questions about a topic, or turning rough notes into three clear lines. It can help the mentor draft a first version of the goal page.

It should not replace the conversation, and it should not be used to produce an "assessment" of the junior. Do not paste personal or confidential information about colleagues or customers into a public AI tool. Under UK GDPR, notes about an identifiable person are personal data, so keep them in a place with limited access.

What to do this month

1. Pick one junior colleague and one mentor, and ask the mentor whether they have the time.
2. Book six sessions of one hour, two weeks apart, and the three-month check.
3. At the first session, write three goals on one page.
4. Use the four questions each time and write three lines at the end.
5. At the check, decide: continue, change or stop.

Sources

• CIPD, Coaching and mentoring factsheet: definitions and the main features of workplace coaching and mentoring.
• Acas, Advice for employers and employees: guidance on handling workplace issues fairly.
• ICO, UK GDPR guidance and resources: guidance for organisations on handling personal data.