Electro-mechanical technicians typically do the following:

• Read blueprints, schematics, and diagrams to determine the method and sequence of assembly of a part, machine, or piece of equipment
• Verify dimensions of parts, using precision measuring instruments, to ensure that specifications are met
• Operate metalworking machines to make housings, fittings, and fixtures
• Inspect parts for surface defects
• Repair and calibrate hydraulic and pneumatic assemblies 
• Test the performance of electro-mechanical assemblies, using test instruments
• Install electronic parts and hardware, using soldering equipment and hand tools
• Operate, test, or maintain robotic equipment
• Analyze and record test results, and prepare written documentation

Electro-mechanical technicians test and operate machines in factories and other worksites. They also analyze and record test results, and prepare written documentation to describe the tests they did and what the test results were.

Electro-mechanical technicians install, maintain, and repair automated machinery and equipment in industrial settings. This kind of work requires knowledge and training in the application of photonics, the science of light. The technological aspects of the work have to do with the generating, controlling, and detecting of the light waves so that the automated processes can proceed as designed by the engineers.

Electro-mechanical technicians also test, operate, or maintain robotic equipment at worksites. This equipment may include unmanned submarines, aircraft, or similar types of equipment for uses including oil drilling, deep-ocean exploration, or hazardous-waste removal.