Positions in this job family are involved in performing professional geological, hydrological and/or engineering duties involving the enforcement of laws and rules in oil and gas exploration and production and pollution abatement and environmental programs. This includes review of applications, permits, inspection reports, test results, sample analysis and other documents in order to determine compliance with rules and laws of pollution abatement and reclamation, production allowables, density, location, well plugging, correlative rights and spacing.