A professional who assists construction-equipment mechanic in repairing, assembling, and adjusting construction equipment, such as internal combustion engines, lighting plants, pumps, air compressors, concrete and mortar mixers, concrete vibrators, generators, pneumatic tools, and portable winches.

• Disassembles and assembles equipment, using mechanic's handtools.
• Washes parts and tools with cleaning fluids, such as gasoline or naphtha.
• Performs other duties as described under helper master title.