I'm a former tech in Virginia. (Read old guy.)
Got my start in the USN/electronics at the end of "tubes" and discrete components, (before the advent of integrated circuits), all transistors, resistors, capacitors and diodes. Navy electronics was a great start for the HVAC business. I worked my way up, gaining experience and education.
Now I review the work of designers and contractors. Its been quite awhile since being hands-on, but I've maintained my interest and Tradesman certifications with the state.
I've followed this forum to stay in touch with the real world. Joining the forum, I hope to give back in the spirit of those who've helped others and myself through the years.