Job Description

On behalf of one of our customers, ClearanceJobs is seeking an experienced Information Systems Security Manager (ISSM) to lead cybersecurity compliance and risk management efforts across our client's ground systems and space vehicle programs. This is an ON-SITE position in Denver Tech Center, CO. An active Top Secret clearance (with SCI eligibility) is required. This position plays a critical role in maintaining our security posture, managing system authorizations, and ensuring continued compliance with Department of Defense (DoD) and Intelligence Community (IC) cybersecurity requirements. The ISSM will lead a team of cybersecurity professionals. This role requires strategic oversight of the Risk Management Framework (RMF) lifecycle and ownership of current and future Authority to Operate (ATO) packages for multiple environments. This role will work closely with engineering teams to ensure customer security controls are properly implemented, thoroughly tested, accurately documented, and fully compliant with applicable requirements. Key Responsibilities:
• Serve as the primary cybersecurity authority for ground and space-based systems throughout their lifecycle
• Lead the development, implementation, and maintenance of RMF packages in accordance with DoD, NIST SP 800-53, and DAAPM requirements
• Maintain and manage ATOs, supporting reauthorization efforts and system updates as mission needs evolve
• Oversee and mentor a team of cybersecurity and IT professionals, ensuring effective execution of technical and compliance responsibilities
• Act as the liaison between internal stakeholders, external assessors, and government accrediting authorities
• Conduct risk assessments, POA&M management, and vulnerability analysis for both legacy and emerging systems
• Ensure compliance with configuration management and change control processes
• Support incident response activities, audit readiness, and continuous monitoring
• Champion cybersecurity awareness and policy adherence across engineering, operations, and leadership teams
• Ensure systems are operated, maintained and disposed of in accordance with internal security policies and the system security plan
• Ensure all users have the requisite security clearances, authorization need-to-know, and are aware of their security responsibilities before being granted access to IS
• Initiate protective or corrective measures when security incident or vulnerability is discovered
• Develop and maintain a system security plan (SSP)
• Conduct periodic reviews to ensure compliance with SSP
• Ensure configuration management for security relevant software, hardware and firmware is maintained and documented
• Create/provide information system security education and awareness training to cleared employees Minimum Qualifications:
• Active Top Secret security clearance (with SCI eligibility)
• Bachelor’s degree and 6 or more years related to secure information system experience, or any equivalent combination of education, training and experience in lieu of degree
• Demonstrated success leading ATO efforts in support of classified systems
• Strong technical acumen in network and system security, with the ability to effectively guide a multi-disciplinary technical team
• Strong documentation and customer service skills
• Security + or CISM certification is required, CISSP is preferred
• Working experience with RMF, ICD 503, CNSSI 1253, NIST SP 800-53/53A, NISPOM Chapter 8, DAAPM Manual
• Experience with DCSA tools such as eMASS, STIGs and SCAP

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