Sr. Information System Security Professionals (ISSO)

Sr. Information System Security Officer (ISSO) ISSELocation: Bowie, MD.The role is part of a cyber and IT team responsible for design, deployment, maintenance, configuration management, monitoring, and troubleshooting of an expanding wide area network supporting a multi-site secure network. Responsibilities include IT system administration tickets for Linux workstations and servers, providing updates to the ISSM for strategic planning, managing risk for PC workstations and peripherals, and traveling to regional sites for support.Primary ResponsibilitiesCoordinate with ISSM for security-relevant changes.Conduct analysis of the Security Impact Analysis of changes to Linux environments / ATO.Evaluate configuration management (CM) for information system security software, hardware, and firmware.Perform and review technical security assessments to identify vulnerabilities and ensure compliance with IA standards and regulations.Validate and verify system security requirements, establish system security designs, and integrate system security capabilities for various environments.Build cybersecurity into systems deployed to operational environments, ensuring uniform application of security policies and enterprise solutions.Assess and mitigate system security threats and risks throughout the program life cycle, contributing to security planning, assessment, risk analysis, and risk management.Apply system security administration expertise in areas such as system security design, life cycle, risk management, and security testing, using industry security engineering methodologies.Support security authorization activities in accordance with government regulations, DoD and NIST RMF standards, and customer-specific security policies, processes, and procedures.Basic QualificationsBS degree and 8+ years of prior relevant experience.Candidates without a bachelor's degree will be considered on a case-by-case basis with additional years of related information-security experience.Active DoD Secret Clearance.Linux experience (RHSCe certification).Conduct security and risk assessments using security frameworks (e.g., NIST, RMF, Common Criteria).Mitigate risk via security controls, testing and evaluation to certify and accredit commercial security products, ensuring privacy of data throughout its life-cycle.Vulnerability management.Business continuity and disaster recovery.Commitment to Non-DiscriminationAll qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.Pay Range$107,900.00 — $195,050.00Original PostingApril 24, 2026J-18808-Ljbffr