Different jobs in the petroleum industry include manual labor positions, roustabouts or roughnecks. In these roles, you assist more experienced mechanical or technical workers on an oil rig. Other roles include oil rig or pipeline technicians, pipefitting and gauge maintenance workers, surveyors, whose duties are to scope out potential energy deposits to extract, and engineers, whose responsibilities are to design and oversee the construction of oil and gas infrastructure, such as pipelines, drilling operations, and production facilities. Jobs in the petroleum industry include work in the oil and natural gas fields, including shale fracking, as well as work on offshore rigs.