Maintains specifications by observing drilling, grooving, and cutting, including turning, facing, knurling and thread chasing operations; taking measurements; detecting malfunctions; troubleshooting processes; sharpening and replacing worn tools; adhering to quality assurance procedures and processes. Any combination of standing, bending, climbing, balancing, kneeling, crouching, reaching, handling, feeling, and walking 8 to 10 hours per day.