The job duties of the Sr. ISSE are as follows: · Provides technical expertise to ensure the network systems meet DIA C&A and IA requirements and are properly certified and accredited · Responsibilities are full-time on customer's onsite and will cover classified programs and Special Access Programs (SAP). No Telework. · Designs, develops, and recommends integrated security system and physical control solutions that will ensure proprietary/confidential data and systems are protected · Assist team in DIA's Authorization and Accreditation (A&A) process using RMF across the design lifecycle for classified systems obtaining and maintaining Interim Authorization to Test (IATT), Authority to Connect (ATC) and Authorization to Operate (ATO) · Offers technical engineering services for the support of integrated security systems and solutions, managing information-related risks effectively · Works closely with the client during the strategic design process to translate security and business requirements into actionable technical designs · Configures and validates secure systems and physical controls, and tests security products and systems to detect security weakness · Develop comprehensive system test plans (STP) to assess the security posture of the information systems · Analyze scan results and security findings to prioritize remediation efforts and implement corrective measures · Participate in incident response activities and assist in the resolution of security incidents as needed