Aircraft Maintenance Engineer (Airframes) Mechanic dismantling, inspecting, testing, repairing, and reassembling aircraft engines.

Helicopter Mechanic have a high technical and mechanical aptitude and are responsible for the repair and maintenance of helicopters. 

Aircraft Maintenance Engineer (Engines) Mechanic responsibilities include conducting inspections, troubleshooting problems, making repairs, and making upgrades to aircraft.

Aircraft Mechanic inspect mechanical, hydraulic and structural systems and diagnose malfunctions.

Airframe and Power Plant Mechanic maintains the airframe and engines of aircrafts to meet FAA standards.

Airframe Mechanic ensures proper working condition of mechanical systems before flight. 

Jet Engine Mechanic maintain, repair, and rebuild aircraft structures, functional components, and parts, such as wings and fuselage, rigging, hydraulic units, oxygen systems, fuel systems, electrical systems, gaskets, or seals.

Pneudraulic Systems Mechanic (Aircraft) disassemble, repair, rebuild, modify, test, troubleshoot, and install more complex hydraulic and pneumatic systems with more extensive repairing, testing, and troubleshooting sequences than the components and systems characteristic.

Powerplant Mechanic (Aircraft) tune, repair, replace, or upgrade aircraft engines, otherwise known as powerplants. 

Rocket Engine Component Mechanic repair and maintain the operating condition of rocket engines.

Machinery Mechanic installing and assembling new machines and equipment. Maintaining a preventative maintenance schedule for inspecting, servicing, and testing machinery.

Mining Machinery Mechanic install, remove, maintain and repair mining equipment.

Mechanic, Machine-Tool operate, service, repair and adjust general machine shop equipment.

Mechanic, Industrial Machinery keep machines in working order by detecting and correcting errors before the machine or the products it produces are damaged.

Mechanic, Plant Maintenance diagnose, troubleshoot, update and repair malfunctioning plant equipment; maintain, repair and overhaul treatment plant equipment including aeration blowers, barminutors, pumps and motors, compressors, belt press, valves, drive units, hydraulic control units, chlorinators, chemical feeders, pneumatic equipment.

Oiler and Greaser will lubricate machinery and perform preventive maintenance on equipment and tools.

Construction Machinery Mechanic  adjust equipment and repair or replace defective parts, components or systems using hand and power tools.

Farm Machinery Repairer maintain, repair, and overhaul farm machinery and vehicles, such as tractors, harvesters, and irrigation systems. 

Mining Machinery Fitter measuring and constructing components out of raw materials through cutting, shaping, and grinding.

Stationary Engine Fitter ensuring safe equipment and work environment. Ensuring proper functioning of the plant and the kiln including water system, chemicals, bark supply, kiln rails.