He is a licensed electrician and a subject-matter expert at a pharmaceutical campus. He has worked in the trades for more than twenty years. His grandfather worked in the trades. His father worked in the trades. His license is electrical. He also works mechanical systems, general building, HVAC, and plumbing. He is not a specialist in all of them.
He left field work for a facilities job after the schedule, the pay, the time off, and the lockout method kept changing from job to job. Before he accepted, the shift, the person who covered his days off, the lockout steps, and the benefits were written down.