computer software development services rendered to federal and state governments and government contractors; computer software design services rendered to federal and state governments and government contractors; design, development, and implementation of software for federal and state governments and government contractors in the fields of cyber security and information assurance, data center management, and development of secure infrastructure; engineering services rendered to federal and state governments and government contractors, namely research, design, development, systems engineering and analysis, testing and integration of hardware and software in the fields of missile defense, space and aviation; systems engineering; computer systems analysis services rendered to federal and state governments and government contractors; computer systems simulation services rendered to federal and state governments and government contractors, namely, virtual testing of air defense systems, missile defense systems, space systems, manned aircraft systems, unmanned aircraft systems, and ground vehicle systems using computer simulation; computer modeling services; scientific research services rendered to federal and state governments and government contractors in the areas of national security technology, national defense, design and integration, test and evaluation, logistics, defense communications, industrial and business services, space transportation and exploration, space systems analysis, security systems and support, information and communications; scientific technological design services rendered to federal and state governments and government contractors in the areas of national security technology, national defense, design and integration, test and evaluation, logistics, defense communications, industrial and business services, space transportation and exploration, space systems analysis, security systems and support, information and communications, namely, research and design in the fields of cyber security and information assurance, data center management, and development of secure infrastructure