About this role
MTSI is seeking an Information Systems Security Manager to lead RMF lifecycle activities from system categorization through authorization to operate in DoD classified environments. This role is based in Washington, DC and requires working closely with government leaders and security stakeholders to ensure robust cyber risk management across multiple systems.
Responsibilities
- Develop and maintain authorization packages
- Coordinate with System Security Assistance (SCA) and Authorizing Official (AO) representatives to resolve findings and adjudicate risk
- Prepare systems for ATO, Interim Authority to Test (IATT), and continuous authorization
- Ensure implementation and validation of security controls per JSIG and NIST 800-53
- Track and remediate Plans of Actions and Milestones (POA&Ms) and enforce accountability for corrective actions
- Conduct internal compliance assessments and inspection preparation
- Assess technical risk and provide written risk recommendations to the government Cyber lead or Security Director
- Ensure configuration management and baseline control integrity
- Provide cybersecurity briefings to senior leadership as required
- Maintain working relationships with external stakeholders
Requirements
- 8+ years of cybersecurity experience in DoD classified environments (SAP/SCI)
- 3+ years of experience as ISSM or equivalent senior cybersecurity lead
- Deep familiarity with JSIG, RMF (DoDI 8510.01), ICD 503, and NIST 800-53
- DoD 8570/8140 IAT Level III or IAM Level II/III certification (CISSP preferred)
- Strong written and verbal communication skills with experience preparing presentation materials for leadership audiences
- Experience working directly with Authorizing Officials and SCAs
- Experience in multi-system portfolio management
- Education: Bachelor's Degree in Cybersecurity, IT, Engineering, or related field (or equivalent experience)
- Clearance: Current/active Top Secret/SCI; Current or recent DoD SAP access; Subject to a Counterintelligence (CI) polygraph