Physical Requirements Job conditions require standing, walking, sitting, twisting, stooping, crouching, kneeling, talking or hearing, making visual inspections, making precise finger and hand movements, reaching or grasping, lifting or carrying up to 25lbs, pushing or pulling up to 50lbs, perceiving color differences, ability to wear personal protective equipment (beards not permitted). About HF Sinclair Corporation HF Sinclair Corporation, headquartered in Dallas, Texas, is an independent energy company that produces and markets high-value light products such as gasoline, diesel fuel, jet fuel, renewable diesel and other specialty products.