Information Systems Security Officer (ISSO)
Mid-level Information Systems Security Officer in Reston, VA owning the security posture and RMF authorization lifecycle of classified and unclassified DoD systems: maintaining A&A documentation (SSPs, POA&Ms, eMASS), running continuous monitoring and vulnerability management, enforcing STIG compliance, and administering privileged access. Requires an active Top Secret clearance and DoD 8140 IAM I
- Compensation
- Not disclosed
- Location
- Reston, VA
- Work setup
- Not specified
- Seniority
- Middle
- Employment
- Contract
- Experience
- 3+ years
- Category
- Security
- Posted
Skills
Must have
- Active Top Secret clearance (with current SSBI or Tier 5 investigation)
- Minimum 3 years in cybersecurity, system administration, or information assurance supporting classified systems under DoD RMF, including hands-on Windows server/desktop administration in classified do
- Hands-on experience contributing to RMF authorization activities and artifacts (SSPs, SCTMs, POA&Ms, eMASS records)
- Active DoD 8140 IAM Level II certification or higher (CASP+ CE, CAP, CISM, or CISSP)
- Working knowledge of NIST SP 800-53 security controls in classified system environments
- Experience performing continuous monitoring, vulnerability management, or cybersecurity hygiene across classified network enclaves
Nice to have
- Bachelor's degree in Computer Science, Cybersecurity, Information Systems, or related field
- Prior dedicated ISSO role, or independently managing/co-owning RMF authorization packages
- Experience supporting DCSA authorization processes and interfacing with SCAs or AOs in DCSA or DARPA contexts
- Experience managing multiple authorization packages or secure environments simultaneously, including SCI or SAP environments
- Experience with Linux operating systems; system hardening and STIG compliance
- Familiarity with NISPOM, DFARS 252.204-7012, and FISMA; basic network administration (Cisco or equivalent)
Full description
About Metron
Metron is an employee-owned company dedicated to delivering innovative solutions for the most challenging national security problems. For over 40 years, our principled approach to problem-solving has yielded creative solutions at the intersection of advanced mathematics, computer science, physics, and engineering. Our people are leaders in their technical fields and are passionate about solving challenging problems. We look for individuals who share this same passion and can apply their experience in real-world settings.
Metron is seeking a capable Information Systems Security Officer (ISSO) to own the cybersecurity posture and authorization lifecycle of multiple classified and unclassified information systems. Working closely with the ISSM, CISO, system administrators, program leadership, and government customers, the ISSO manages day-to-day security operations, maintains authorization and accreditation documentation, and keeps systems compliant and mission ready.
This role suits a mid-level practitioner with a solid RMF foundation and hands-on classified system experience who is ready to take ownership of authorization packages with the support of an experienced ISSM and CISO. It is well suited to a strong system administrator or information assurance professional stepping into a dedicated ISSO role, and offers meaningful room to grow within an expanding classified program portfolio.
Core Responsibilities
- Manage the Assessment and Authorization (A&A) lifecycle for assigned systems in accordance with RMF, JSIG, NIST SP 800-53, DISA STIG, and DoD/DCSA policy, under the direction of the ISSM, and maintain readiness for recurring assessments.
- Develop and maintain SSPs, SCTMs, STIG packages, POA&Ms, risk assessments, and eMASS records, ensuring documentation reflects the current architecture and security posture.
- Evaluate proposed system changes for cybersecurity, compliance, and authorization impact, and prepare systems for internal reviews, customer assessments, and inspections.
- Execute and document continuous monitoring (ConMon) and vulnerability management across assigned classified enclaves, tracking findings through remediation and closure.
- Review configuration, audit, access, and security-control evidence against applicable baselines and STIGs, and drive corrective actions under the POA&M process.
- Administer user and privileged access based on role, need-to-know, and least privilege, and enforce requirements for removable media, data transfers, classified information handling, and secure equipment movement.
- Support COMSEC accountability, incident investigation and reporting (policy violations, unauthorized access, data spills), and classified communications link operations including SIPRNet, in coordination with the ISSM.