Information System Security Manager (ISSM)

We are seeking a highly skilled and innovative Information System Security Manager (ISSM) to join our team in the greater DMV area, supporting the Army National Guard.

Responsibilities

Oversee cybersecurity posture for multiple systems or an enterprise segment as the ISSM, directing ISSOs and technical teams in implementing RMF, FISMA, and DoD/Army policies.
• Define security strategies, risk tolerance application, and controls implementation approaches aligned with the Cybersecurity Strategy Plan, CsMP, and RMF Plan.
• Review and approve ISS documents, system security plans (SSPs), POA&Ms, incident response plans (IRPs), and compliance reports; brief leadership on risk, accreditation timelines, and inspection readiness.
• Coordinate with ARNG, RCCARNG, ARCYBER, USCYBERCOM, and other authorities on significant issues, incident reporting, and enterprisewide process improvements.
• Provide authoritative guidance on control implementation, continuous monitoring, configuration management, and evidence collection for authorization packages.
• Lead security risk assessments, vulnerability remediation prioritization, and validation of mitigation effectiveness across assigned systems.
• Manage security governance activities, training/awareness for security personnel, and oversight of security operations supporting accreditation and audits.
• Drive improvements to security processes, produce decisiongrade security artifacts, and mentor ISSO/technical staff.

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Qualifications

• 5 years with BS/BA; 3 years with MS/MA; 0 years with PhD

• Clearance: Active TS/SCI clearance.

• Candidate must meet ONE of the following:

  • Master's degree or Ph.D. in Computer Science, Cybersecurity, Data Science, Information Systems, Information Technology, Software Engineering, or a related field; OR
  • Relevant DoD/military training (examples: 4CFA26A; M09CHN1; A5310009; Information Systems Security Manager (Advanced) Playlist); OR
  • Relevant professional certification or equivalent experience (examples: CISM, CISSP, CISSPISSMP, FITSPM, GCIA, GCIH, GICSP, GSLC).

• Required experience and skills:

  • Cybersecurity experience with ISSM/ISSO or senior security leadership roles supporting DoD or large enterprise environments.
  • Deep knowledge of RMF/ATO lifecycle, NIST SP 80053 control families, FISMA, DISA STIGs/SRGs, continuous monitoring, and eMASS/RMF evidence workflows.
  • Proven ability to produce and approve authorization artifacts (SSP, SAR, POA&M), manage accreditation timelines, and brief senior leadership on security posture and residual risk.
  • Strong incident coordination experience, understanding of chainofcustody, reporting channels, and coordination with higher authorities (ARCYBER/USCYBERCOM).
  • Excellent stakeholder engagement, governance facilitation, and mentoring skills for security teams.

• Desired:

  • Prior ARNG/DoD ISSM experience and familiarity with enterprise security strategy/planning (CsMP).
  • Experience integrating security with DevSecOps, cloud authorization, and crossdomain solutions.
  • Advanced certifications (CISM, CISSPISSMP, FITSPM) and demonstrated track record managing complex authorization packages and inspection readiness.

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Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can't be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we're keeping people around the world safe and secure.