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Information Systems Security Manager (ISSM)

Modern Technology Solutions, Inc. (MTSI)
Washington, DC Full Time
POSTED ON 9/9/2026
AVAILABLE BEFORE 12/24/2026
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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Salary.com Estimation for Information Systems Security Manager (ISSM) in Washington, DC
$152,841 to $186,087
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