As an overhead crane operator, your duties and responsibilities include operating different types of cranes, such as a gantry crane, at a construction site, rail depot, shipyard, or another facility. You use cranes for lifting steel components, ship containers, or other large objects. For example, at a construction site, you may move beams or mechanical equipment up to the tops of skyscrapers. At a port, on the other hand, you use cranes to unload ships and load trucks or trains which carry the freight to distribution facilities.