Senior ISSO: Lead RMF, ATOs & Security Strategy

Peraton Corporation; Washington (District of Columbia); On-site; USD 112,000 - 179,000; Full time

Job summary

Peraton is seeking a Senior Information System Security Officer (ISSO) to lead RMF/ATO activities for complex boundary systems and mentor junior staff. You will partner with internal teams to implement scalable compliance patterns and brief leadership on risk trends and readiness.

Responsibilities include writing risk decisions, maintaining SSPs and artifacts, and overseeing continuous monitoring, vulnerability management, and configuration compliance. Top Secret/SCI eligibility is required.

Qualifications

• Requires active Top Secret clearance with SCI eligibility.
• 12+ years with a BS/BA or 10+ years with an MS/MA; 4 years may substitute for a BS.
• 8+ years in information security/compliance for DoD/IC or government systems with RMF deliverables.
• Ability to write risk decisions and packages for assessor/AO review.
• Strong knowledge of NIST SP 800-53 and mapping to implementations.
• Experience with vulnerability and configuration compliance workflows.

Responsibilities

• Lead or co-lead RMF/ATO efforts for complex boundary systems.
• Mentor junior ISSOs and shape security playbooks.
• Perform risk analysis and author formal leadership recommendations.
• Drive security engineering outcomes with internal teams on compliant patterns.
• Brief senior stakeholders on security posture, risks, and readiness.
• Support the system security lifecycle across development, operations, and modernization.
• Execute and maintain RMF activities: evidence collection, POA&M management, continuous monitoring.
• Maintain SSP, control narratives, diagrams, and contingency artifacts.
• Operate continuous monitoring: vulnerability management, patching, and risk acceptance.
• Review changes for security impact and validate configurations after upgrades.
• Support incident response and post-incident lessons learned.
• Ensure least privilege governance: account management and access reviews.
• Translate security requirements into actionable guidance for engineering.

Skills

RMF knowledge

Risk analysis

Security leadership

Mentorship

Communication of risk

ATO/SSP coordination

Education

BS/BA in related field

MS/MA in related field

Tools

Splunk

ACAS

Nessus

Job description

Peraton is seeking a Senior Information System Security Officer (ISSO) to lead RMF/ATO activities for complex boundary systems and mentor junior staff. You will partner with internal teams to implement scalable compliance patterns and brief leadership on risk trends and readiness.

Responsibilities include writing risk decisions, maintaining SSPs and artifacts, and overseeing continuous monitoring, vulnerability management, and configuration compliance. Top Secret/SCI eligibility is required.