Operate equipment and machinery which may be hand-operated, automatic, or semi-automatic, such as tanks, pumps, stills, spray jets, stream jets, air jets, control valves, sheet metal cabinets and hoods and aprons, conveyors and hoists, mechanical washing & degreasing equipment, and baskets for handling stock while maintaining volume of solutions, drain/replenish tanks of solutions, and operating distilling and reclaiming apparatuses. Headquartered in Reston, Virginia, General Dynamics is a global aerospace and defense company offering a broad portfolio of products and services in business aviation; ship construction and repair; land combat vehicles, weapons systems and munitions; and technology products and services.