An excavator operator controls and maintains an excavator, which is a piece of heavy machinery used to dig trenches and other holes necessary for laying piping and other infrastructure. In this career, you typically work in the civil engineering or commercial construction field. In addition to digging trenches, your responsibilities include laying the piping, maintaining and inspecting your equipment, and performing routine safety checks on the vehicles. As an excavator operator, your duties may include including operating other heavy equipment as needed on the construction site as well.