A professional who inspects, tests, repairs, and installs equipment, such as liquid gas converters and compressors in field installations to supply compressed gas for industrial and therapeutic use. Responsibilities include:

• Dismantles, tests, and analyzes malfunctioning equipment, using blueprints, manuals, handtools, and power tools, and tests apparatus to locate defects.
• Tests, repairs, and adjusts electrical circuits and equipment, such as starters, motors, rectifiers, relays, and heaters, using schematics and handtools and power tools.
• Solders, brazes, and welds materials to repair and replace copper and steel piping and equipment parts.
• Records repair work performed and condition of equipment.