Define the work that cannot wait
If the position needs independent responsibility for intermittent no-start on a cold morning, identify the credentials, judgment and authorization that assignment really requires. Hiring a novice into an unstaffed expert job is not a training plan. If a mentor is available and the tasks are staged safely, an apprentice may be a practical longer-term option.
Count supervision as a real resource
An apprentice can add capacity over time, but first needs qualified supervision. Learning the shop’s inspection workflow, tool checkout and the difference between scheduled service and a fault diagnosis. Estimate how much mentor time the position will require during the first several weeks. An experienced employee still needs orientation to the organization’s equipment and rules.
Write two different job advertisements
For the junior role, describe the training route, supervision, progression and whether it is part of a registered program. For the experienced role, describe independent responsibilities, performance expectations and the relevant licenses. Separate heavy-equipment, truck fleet, dealership and mobile-service expectations. Do not use one ambiguous posting for two fundamentally different jobs.
Set the compensation logic
Junior roles should describe wage progression and how competence is checked. Experienced roles should explain the pay basis for specialist duties, leadership, travel or on-call work. Road-call duty, rotating shifts and tool ownership can materially change a compensation package. A candidate cannot judge the offer if the company hides important conditions until the final call.
Choose based on the next twelve months
If your recurring work involves aftertreatment complaint needing controlled diagnosis, can the team build that capability through coaching and repeat assignments? Or is there an immediate specialized workload with no qualified mentor? Decide based on actual upcoming work rather than a universal claim that juniors or veterans are “better.”