Senior Information System Security Officer

Peraton is seeking a Senior ISSO to support our customer onsite in Annapolis Junction MD.

Key responsibilities include:

• Lead or co-lead ATO/reauthorization efforts for complex boundary systems
• Mentor junior ISSOs and shape security operations playbooks
• Perform risk analysis and author formal recommendations to leadership
• Drive security engineering outcomes by partnering with internal teams on scalable compliance patterns
• Brief senior internal and customer stakeholders on security posture systemic risk trends remediation burn-down and authorization readiness
• Act as the Senior ISSO supporting the system security lifecycle across development operations and modernization
• Execute and maintain RMF activities (e.g. control implementation oversight evidence collection assessment support POA&M management continuous monitoring)
• Maintain security authorization artifacts (e.g. SSP control narratives diagrams inheritance/leverage controls CM plan incident handling plan contingency artifacts user/admin procedures)
• Operate continuous monitoring: vulnerability management config compliance patching coordination scan result triage risk acceptance and remediation verification
• Review and approve security-relevant changes through configuration/change control and validate security configurations after major upgrades
• Support incident response and reporting: participate in investigations coordinate containment actions preserve evidence and contribute to post-incident lessons learned
• Ensure least privilege/access governance: account management oversight privileged access workflows periodic access reviews and audit compliance requirements
• Translate security requirements into implementation guidance that engineering teams can operationalize (clear testable and automatable where possible)

Required Qualifications

• Requires active Top Secret clearance with SCI eligibility
• Min 12 years with BS/BA Min 10 years with MS/MA; may consider 4 additional years experience in lieu of BS degree.
• 8 years of experience in information security/compliance supporting DOD/IC or government systems including ownership of major RMF deliverables and ATO events for complex systems
• Demonstrated leadership experience coordinating across security engineering and customer stakeholders
• Ability to provide mentorship and direction to team members
• Proven ability to write risk decisions and packages that stand up to assessor/AO scrutiny
• Deep understanding of continuous monitoring at scale (recurring evidence metrics audit readiness remediation governance)
• Hands-on experience executing RMF tasks and maintaining authorization artifacts (SSP POA&Ms continuous monitoring evidence)
• Strong working knowledge of NIST SP 800-53 controls and how they map to technical implementations and procedures
• Experience with vulnerability and configuration compliance workflows
• Ability to communicate risk clearly to both technical engineers and non-technical leadership
• One or moreactive/currentcertifications such as: CISSP CISM SecurityX Security and etc.

Preferred Qualifications

• Experience with SAP assessments and authorizations
• Experience securing or assessing different platforms (applications databases operating systems hardware and etc )
• Experience with SCRUM methodologies
• Experience with Splunk and/or other auditing compliance tools.
• Experience with ACAS Nessus and/or other vulnerability scanners
• Experience with data protection requirements relevant to sensitive environments

Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the worlds leading mission capability integrator and transformative enterprise IT provider we deliver trusted highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land sea space air and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day our employees do the cant be done by solving the most daunting challenges facing our customers. Visit to learn how were keeping people around the world safe and secure.