As an oilfield pumper, you operate and maintain all auxiliary equipment that pumps oil. Your responsibilities are to install a pump system, monitor the pumping rate, and separate natural gas from oil. Your duties also task you with setting pump pressure, density, rate, and concentration to ensure cost-effective operations. You use several tools and mechanical skills to maintain oil pumps and their pipe sections. You might also work on pump gauges. Before monitoring these pumps, you must assemble the piping and all equipment. Training roustabouts or unit operators is also part of your responsibilities.