Horologist .
- repairman - doctor - mechanic - technician - healer
HVAC (Heating, Ventilation, Air Conditioning) Technician
A person who works on both clocks and watches or watches alone (for some reason) is called a Horologist. But I have been told by a French man who has four generations of watch/clockmakers in his family that a clockmaker that only works on clocks is called a Pendulier (can't find the correct spelling)
The person is a steel-worker.
Timers, oscillators, square wave generator, power supply clocks, system clocks...you name it.
Horologist .
it must be horologist!
What you call person who fixes light
Horologist
A mechanic.
A person who fixes the glass portion of windows is called a glazier.
Mechanic
Cobbler
i love u
A plumber
A person that fixes lights is called an electrician. They are able to fix and repair electric wiring, lights, and appliances.
Horologist or a clock maker.