Onsite ISSO | DoD RMF Expert | Top Secret/SCI

MANTECH; San Diego (CA); On-site; USD 110,000 - 170,000; Full time

Job summary

MANTECH is seeking a motivated Information System Security Officer to join our team in San Diego, CA. This onsite role focuses on securing information systems in accordance with DoD RMF requirements and organizational policies.

You will maintain A&A documentation, manage RMF packages, oversee continuous monitoring, and support incident response. Qualified candidates have a Security+ and 4+ years of information security experience, with DoD-related knowledge and a Top Secret/SCI eligibility

Qualifications

• Bachelor’s degree with 4+ years of information systems security experience, or equivalent experience (11+ years if no degree).
• Security+ Certification.
• 3+ years’ experience with RMF, ICD 503, NIST SP 800-53, JSIG, or DJSIG.
• Knowledge of current DoD authorization practices.

Responsibilities

• Maintain A&A documentation per JSIG, NIST SP 800-37, and NIST SP 800-53 with SSPs, Contingency Plans, and Incident Response procedures.
• Track POA&M deficiencies and provide quarterly status updates to the ISSM and SCA.
• Implement Continuous Monitoring to ensure ongoing authorization packages.
• Oversee audit log collection systems and perform weekly reviews to maintain system integrity.
• Manage hardware and software inventories, ensuring assets remain vendor-supported.
• Maintain security tools, patch management, and vulnerability programs in coordination with Cybersecurity team.
• Assess changes with CCB to evaluate security impacts.
• Facilitate annual security awareness and role-based training, account verification, and ISSM support.

Skills

RMF / DoD security

Security+ certification

DoD security knowledge

Education

Bachelor’s degree in IT / Cyber Security / CS / IS Management / Engineering

Associates degree + 6 years experience

High School Diploma + 11+ years experience

Job description

MANTECH is seeking a motivated Information System Security Officer to join our team in San Diego, CA. This onsite role focuses on securing information systems in accordance with DoD RMF requirements and organizational policies.

You will maintain A&A documentation, manage RMF packages, oversee continuous monitoring, and support incident response. Qualified candidates have a Security+ and 4+ years of information security experience, with DoD-related knowledge and a Top Secret/SCI eligibility