Information System Security Officer (ISSO), US ADC Security

About This Role

This Information System Security Officer (ISSO) role involves assessing, authorizing, and continuously defending information systems for a high-priority U.S. Government program. You will be responsible for developing and maintaining security documentation, driving Assessment & Authorization (A&A) activities, and ensuring continuous monitoring in accordance with the NIST Risk Management Framework (RMF). The position requires collaboration with engineering teams and government counterparts to maintain the system's authorization posture.

Responsibilities

• Develop, maintain, and continuously improve the System Security Plan (SSP) and all supporting authorization documentation
• Prepare and maintain security control implementation evidence and the body of evidence required for system authorization
• Coordinate and support security control assessments
• Manage Plans of Action & Milestones (POA&Ms) from identification through closure, ensuring timely remediation of findings
• Execute continuous monitoring activities in accordance with the NIST Risk Management Framework (RMF) and organizational policies
• Partner with platform build and engineering teams to ensure security controls are properly implemented, configured, and documented
• Collaborate with the Information System Security Manager (ISSM) and U.S. Government counterparts throughout the full RMF lifecycle
• Proactively identify security gaps and vulnerabilities, recommend remediation strategies, and track resolution to completion
• Support audit readiness and respond to ad hoc security inquiries from government stakeholders
• Contribute to the development and refinement of security processes, templates, and automation to improve A&A efficiency

Requirements

• 3+ years of RMF/A&A or ISSO experience
• Working knowledge of NIST 800-53, RMF, and SSP development
• Working knowledge of Service Now to apply the RMF
• Experience producing authorization artifacts and evidence
• Current, active US Government Security Clearance of TS/SCI with Polygraph

Nice to have:

• Experience with U.S. Government/IC RMF and ICD 503 authorization
• Familiarity with the Government-provided RMF workflow tooling
• Security certification (e.g., CISSP, Security+)

Benefits

• Sign-on payments and restricted stock units (RSUs)
• Health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage)
• 401(k) matching
• Paid time off