Horologist .
HVAC (Heating, Ventilation, Air Conditioning) Technician
The type of professional that fixes hot water boilers is a plumber. They can also do other things, such as install and repair leaks to the kitchen sink and bathroom.
No they are not the same thing a Marine biologist studies the animals and plants in the ocean while a Marine engineer fixes things in the water.
The person is a steel-worker.
What you call person who fixes light
Horologist
Horologist .
A mechanic.
Horologist .
A person who fixes compasses is typically known as a compass adjuster or compass technician.
A person who fixes the glass portion of windows is called a glazier.
Mechanic
Cobbler
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A plumber
A person that fixes lights is called an electrician. They are able to fix and repair electric wiring, lights, and appliances.