gearman
/ˈɡɪərˌmæn/Definitions
1. noun
A person who operates or maintains machinery, especially heavy machinery, such as cranes or excavators.
“The gearman ensured the crane was properly calibrated before lifting the heavy load.”
2. noun
A person who repairs or adjusts the gears of machinery.
“The gearman spent hours fine-tuning the gears of the old clock.”