Early on in my electrical career i worked hard to acquire a state unrestricted high voltage license. I would say a gagillion hours. And later on, to facilitate even more know how, I acquired an unrestricted low voltage license. Another bazillion hours of study. Both of these licenses require continuing education.  Perhaps a day class or a seminar once a year.

My customers get the competitive advantage of a multi  licensed and multi decade experience Electrical contractor .  All transparent with a license that has a  date.