Inspects, repairs and signs for the aircraft everybody else flies.

A licensed mechanic’s signature is what makes an aircraft legal to fly, and that is the job in one sentence. The work is scheduled inspection, fault diagnosis and repair to a published standard, with a paper trail behind every action. It is a licensed trade, entered by apprenticeship or by an approved training course rather than by degree.
Paid, several years, and the most common route. An airline or a maintenance organisation trains you on their fleet.
A full-time programme at an approved school, followed by experience requirements before the licence is issued.
Service maintenance training converts across with documented experience.
Aircraft and avionics equipment mechanics and technicians · US Bureau of Labor Statistics, Occupational Outlook Handbook, May 2024 wages and 2024–34 projections.
Published together with avionics technicians. The Handbook gives $78,680 for aircraft mechanics specifically and $81,390 for avionics technicians.
Hangars are cold in winter and hot in summer, and heavy maintenance runs at night because that is when aircraft are on the ground. The paperwork is not bureaucracy (a repair with no record did not happen) and it takes as long as the work. Your signature carries legal weight for years afterwards.