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Information Systems Security Manager (ISSM)

Modern Technology Solutions, Inc.

Posted today
Top Secret/SCI
Unspecified
CI Polygraph
IT - Security
Washington, DC (On-Site/Office)

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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About Us
Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned technology firm specializing in Digital Engineering, Space Systems, Unmanned Systems, Flight Test Engineering, Modeling and Simulation, Cybersecurity, and DevOps for vital defense and intelligence programs. MTSI excels in delivering premier solutions to address global challenges. Founded in 1993, MTSI now operates across 20+ global offices and field sites. Perks of being part of MTSI's employee-ownership culture include: • 6% 401k matching with immediate vesting • Semi-annual performance bonuses • Company-funded Employee Stock Ownership Plan (ESOP) • 20 days of paid time off (PTO), 10 paid holidays, and flexible work schedules • Optional zero-deductible BC/BS insurance with FSA • Certified as a top workplace Join us in a company with a long-term strategy and a commitment to our employee-owners, free from external shareholders' demands.

Modern Technology Solutions, Inc. Jobs


Job Category
IT - Security
Clearance Level
Top Secret/SCI