Senior Information Systems Security Officer TS​/SCI w​/Poly

Purpose and Impact

Amentum is seeking a self‑starting, motivated individual to serve as the Information System Security Officer supporting Computer Network Operations. The role focuses on maintaining compliance and strengthening the security posture of critical mission systems through the Risk Management Framework and managing six System Security Plans (SSPs).

• Ensure the operational security posture is maintained for information systems.
• Support continuous monitoring of networks to detect and correct security non‑compliance, unmitigated vulnerabilities, and other risks.
• Follow consistent security processes and participate in the information systems continuous monitoring program.
• Perform regular audits of information systems.
• Assist the information systems security manager in preparing the system for periodic reaccreditation.

Experience as an ISSO with emphasis on Defense‑in‑Depth principles, network and enterprise security architecture, and application of the NIST 800‑53 principles, including the RMF procedures. Familiarity with STE/STN requirements and associated tools and tradecraft.

TS/SCI Poly.

• Bachelor's degree plus 8‑years of relevant experience.
• Master's degree plus 6‑years of relevant experience.
• Associate's degree or 18 semester hours of military coursework/training in a computer‑related field plus 10‑years of relevant experience, or high school diploma/GED plus 12‑years of relevant experience.

• Information Assurance Manager (IAM) Tier1 certification.

Excellent written and oral communication skills.

This position is not designated as a safety‑sensitive position. Amentum is a drug‑free workplace and requires drug screening as a condition of employment.

$140,000‑$180,000.

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits, including 401(k) matching
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax‑saving options
• Disability and life insurance
• Pet insurance

Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability, or protected veteran status.