Millwright, assembly-line mechanic. 24V relays, pneumatics, programmable logic chips PLC's

Robot arms on an assembly line are sometimes electro-hydraulic, or electro-pneumatic, or full electrical with synchros and servo motors. Stepper motors. If you want to impress people, build your own bomb defusing robot with a camera and robot arm. 6WD. Use RC components. Opto-couplers as a switch activator. Hall sensors, reed switches. Normally open, normally closed NO/NC...

Also basic 120V/240V motors and drives. 3-phase, single-phase...

If you can do one, you can do the other.