Knowledge of IT INFOSEC security requirements for certification and accreditation, network operations and protocols, systems testing and evaluation, and performance management methods sufficient to plan and conduct security accreditation reviews for installed systems or networks and assess/advises on new or revised security measures and countermeasures based on the results of accreditation reviews. Knowledge of a broad range of telecommunications concepts and principles, operating modes, systems, media, equipment, equipment configuration and related software systems, processes and procedures to assess and advise on vulnerability to attack from a variety of sources (e.g., espionage, disruption of services, destructive programs/applications) and procedures and methods for protection of systems and applications.