Modern Technology Solutions, Inc. (MTSI) is seeking a Information Systems Security Manager to lead RMF lifecycle activities from system categorization through ATO.

Your essential job functions will include but may not be limited to:

• Develop and maintain authorization packages 
• Coordinate with SCA and AO representatives to resolve findings and adjudicate risk
• Prepare systems for ATO, IATT, and continuous authorization
• Ensure implementation and validation of security controls per JSIG/NIST 800-53.
• Track and remediate POA&Ms; enforce accountability for corrective actions.
• Conduct internal compliance assessments and inspection preparation
• Assess technical risk and provide written risk recommendations to government Cyber lead/Security Director.
• Ensure configuration management and baseline control integrity
• Provide cybersecurity briefings to senior leadership as required
• Maintain working relationships with external stakeholders.

Required:

• 10+ years cybersecurity experience in DoD classified environments. (SAP/SCI)
• 3+ years experience as ISSM or equivalent senior cybersecurity lead
• Deep familiarity with: JSIG, RMF (DoDI 8510.01), ICD 503, NIST 800-53
• DoD 8570/8140 IAT Level III or IAM Level II/III certification (e.g., 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 Requirements:

• Bachelor's Degree in Cybersecurity, IT, Engineering, or related field (or equivalent experience).

Clearance Requirements:

• Current/active Top Secret/SCI; Current or recent DoD SAP access
• Subject to a Counterintelligence (CI) polygraph

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