Technician (noun)

1. A person skilled in the techniques of a particular job or activity.
2. A person who services and repairs complex equipment or machinery.

Origin:

From latin technicus, from greek tekhnikos, from tekhne art, craft, skill, literally means "of art or craft".

Examples:

1. The technician fixed my computer.
2. She's a dental technician.
3. The technician was able to repair the broken machine.
4. He was a highly skilled technician in his field.
5. The technician was able to diagnose the problem with the car.