Control equipment, such as compressors, evaporators, heat exchangers, and refrigeration equipment to process gas for utility companies and for industrial use.

Calculates gas ratios, using testing apparatus, to detect deviations from specifications. Tests oxygen for purity and moisture content at various stages of process, using burette and moisture meter. Controls operation of compressors, scrubbers, evaporators, and refrigeration equipment to liquefy, compress, or regasify natural gas. Controls fractioning columns, compressors, purifying towers, heat exchangers, and related equipment, to extract nitrogen and oxygen from air. Adjusts temperature, pressure, vacuum, level, flow rate, or transfer of gas, according to test results and knowledge of process and equipment. Observes pressure, temperature, level, and flow gauges to ensure standard operation. Reads logsheet to ascertain demand and disposition of product or to detect equipment malfunctions. Records gauge readings and test results. Signals or directs workers tending auxiliary equipment. Cleans and repairs equipment, using hand tools.

Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance. Chemistry -- Knowledge of the chemical composition, structure, and properties of substances and of the chemical processes and transformations that they undergo. This includes uses of chemicals and their interactions, danger signs, production techniques, and disposal methods.

Operation and Control -- Controlling operations of equipment or systems. Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly. Mathematics -- Using mathematics to solve problems. Quality Control Analysis -- Conducting tests and inspections of products, services, or processes to evaluate quality or performance. Repairing -- Repairing machines or systems using the needed tools. Troubleshooting -- Determining causes of operating errors and deciding what to do about it. Equipment Maintenance -- Performing routine maintenance on equipment and determining when and what kind of maintenance is needed.

Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources. Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Documenting/Recording Information -- Entering, transcribing, recording, storing, or maintaining information in written or electronic/magnetic form. Identifying Objects, Actions, and Events -- Identifying information by categorizing, estimating, recognizing differences or similarities, and detecting changes in circumstances or events.