Engineering Services in support of the Development and Production of Armament Systems At McCormick Stevenson we embrace a simple but noble purpose - to Defend Human Liberty - a mission we execute through service to America’s warfighters. With deep expertise gained through an exclusive focus on the development and production of armament systems, our team delivers immediate impact. As a small, non-traditional defense contractor, our agility and responsiveness allow us to meet a wide range of challenges while ensuring on-time delivery of the optimal solution.