engineering services in the field of computer and information technology systems, software design and development, mechanical engineering, electrical engineering, computer network configuration and electronic communications network, and information assurance; network operations and management services, namely, development of software for secure network operations and management; information services, namely, development of customized software for others for use in information security, and computer security consultancy; security assessments in the nature of development of security systems and contingency planning for information systems; network security services, namely, computer security consultancy in the field of scanning and penetration testing of computers and networks to assess information security vulnerability