A pump operator is someone who works with stationary or portable pumps. He or she will transfer liquids, gases, and powdered materials in and out of vessels and processes, perform inspections and maintenance on various machinery, and troubleshoot issues with systems and processes.

There are various areas where pump operators can work. Pump operator positions include pipeline operators, day light relief operators, chemical operators, pump station operators, purification operators, and tank car loaders. There are also blend technicians, cable maintainers, process operators, and utility operators. All pump operators need to obtain specific training in order to work in their chosen area.