Test and analyze geological samples, crude oil, or petroleum products to detect presence of petroleum, gas, or mineral deposits indicating potential for exploration and production, or to determine physical and chemical properties to ensure that products meet quality standards.

Other names for Geological Sample Test Technicians: Acid Tester, Chalk Tester, Consulting Petroleum Geologist, Core Inspector, Crude Tester, Electron Microprobe Operator, Environmental Field Services Technician, Environmental Geologist, Environmental Sampling Technician, Environmental Scientist, Gas Analyst, Gas Prover, Gas Tester, Gasoline Tester, Geological Sample Tester, Geological Technician, Geologist, Geology Technician, Geotechnicial Properties Technician, Hydrology Technician, Laboratory Assistant, Laboratory Manager, Laboratory Technician, Laboratory Worker, Marine Geologist, Materials Technician, Mineral Technologist, Mud Analysis Operator, Mud Analysis Well-Logging Captain, Mud Analysis Well-Logging Operator, Mud Logger, Oil Analyst, Oil Field Tester, Oil Laboratory Analyst, Oil Tester, Oil Well Logger, Ore Tester, Petroleum Analyst, Petroleum Geologist, Quality Control Technician (QC Technician), Research Associate, Specialist Field Engineer, Temperature Logging Operator, Test Engine Evaluator, Test Engine Operator, Test Technician, Tester, Well Logger,

• Test and analyze samples in order to determine their content and characteristics, using laboratory apparatus and testing equipment.
• Collect and prepare solid and fluid samples for analysis.
• Assemble, operate, and maintain field and laboratory testing, measuring, and mechanical equipment, working as part of a crew when required.
• Compile and record testing and operational data for review and further analysis.
• Adjust and repair testing, electrical, and mechanical equipment and devices.
• Supervise well exploration and drilling activities, and well completions.
• Inspect engines for wear and defective parts, using equipment and measuring devices.
• Prepare notes, sketches, geological maps, and cross sections.
• Participate in geological, geophysical, geochemical, hydrographic or oceanographic surveys, prospecting field trips, exploratory drilling, well logging or underground mine survey programs.
• Plot information from aerial photographs, well logs, section descriptions, and other databases.
• Assess the environmental impacts of development projects on subsurface materials.
• Collaborate with hydro-geologists in order to evaluate groundwater and well circulation.
• Prepare, transcribe, and/or analyze seismic, gravimetric, well log or other geophysical and survey data.
• Participate in the evaluation of possible mining locations.