Advanced professional scientific research and engineering for defense contracting and government contracting in the fields of advanced technology, professional engineering services, government systems, aeronautics, aerospace studies, professional aeronautics, aircraft engineering technology, aerospace science, aerospace engineering, aerospace electronics, aeronautical systems maintenance, airway science, astronautics, avionics engineering technology, nautical, space engineering, physics, space physics, astrophysics, engineering physics, architectural services, civil engineering, chemical engineering, computer science, computer engineering, computer systems engineering, software engineering, drafting services, electrical/electronic engineering, environmental/environmental health engineering, industrial/manufacturing engineering, material engineering, mechanical engineering, nuclear engineering, petroleum engineering, security systems, weapon systems, medical technology, biomedical/biomedical engineering, medical science, physical science and life science; Providing professional consulting services in the fields of computer disaster recovery planning, computer security and information technology security; Providing professional research and development services in the fields of military science and engineering; Providing professional consulting services in the field of engineering; Providing professional research and development services in the fields of military science, engineering and technology; Professional services, namely, military engineering