Enterprise Support ISSE (Senior)

Everforth ECS is seeking an Enterprise Support ISSE (Senior) to work in Fairfax, Virginia. Please Note: This position is contingent upon contract award.

 

Responsibilities

• Engineer and validate implementation of security controls across enterprise infrastructure, hosting platforms, identity services, and network environments supporting Task 4operations
• Integrate technical safeguards including configuration baselines, encryption mechanisms, logging and monitoring configurations, vulnerability mitigation measures, and access control enforcement in accordance with DoD/ARNG cybersecurity policy and RMF requirements
• Conduct control validation activities and security assessments to verify proper implementation and continued effectiveness of required security controls across enterprise systems
• Support Authority to Operate (ATO) sustainment activities, including continuous monitoring, security documentation maintenance, and Plan of Action and Milestones (POA&M) management
• Coordinate remediation of identified security findings, vulnerabilities, STIG deficiencies, and IAVM compliance gaps across operations and engineering teams
• Advise operations and engineering teams on secure implementation strategies, defense-in-depth principles, and security architecture best practices to maintain compliant and defensible enterprise environments
• Perform security engineering reviews of infrastructure changes, system upgrades, configuration modifications, and new technology integrations prior to production deployment
• Support RMF lifecycle activities including security categorization, control selection, implementation assessment, authorization documentation, and continuous monitoring
• Manage and maintain accreditation packages for systems operating at Secret and Top Secret classification levels
• Provide security engineering guidance for enterprise modernization initiatives, including cloud migration, Zero Trust implementation, and DevSecOps pipeline integration
• Coordinate with enterprise operations, hosting, network, identity services, and cybersecurity teams to ensure integrated security posture across all operational domains
• Contribute to enterprise security planning efforts related to ARNG initiatives such as A365/DoD365, AESMP, C2C, AUDS-U/C, AGUN, and CBII, ensuring security control alignment across modernization programs