HF Sinclair owns and operates refineries located in Kansas, Oklahoma, New Mexico, Wyoming, Washington and Utah and markets its refined products principally in the Southwest U.S., the Rocky Mountains extending into the Pacific Northwest and in other neighboring Plains states. May develop works scopes and supervise various staff such as Maintenance Supervisors, Maintenance Engineers, Warehouse Foremen, Pipe Fitter/Welders, Insulators, Instrument & Electrical crafts, Equipment Operator/Craft Helpers, and Yard Laborers.