CGS Federal (Contact Government Services)
Information System Security Officer (ISSO)
$120K–$200K
Washington, DC +1 · On-site · Full-time · Posted Feb 10, 2026
- Location
- Washington, DC
Arlington, VA
About the job
Serves as the on-site security and compliance authority for government data and application platforms, supporting system authorization, security controls, documentation, evidence, and audits.
What you'll do
- Support system accreditation and authorization, including maintaining security documentation and compliance evidence.
- Partner with engineering and operations teams to implement and validate security controls and configurations.
- Support audits and ongoing compliance across cloud and on-premises environments.
What they ask for
- Experience accrediting IT systems against U.S. Government standards such as NIST SP 800-53, CNSSI 1253, and DISA STIGs.
- Hands-on accreditation experience with eMASS or Xacta.
- Experience collaborating with engineering teams to implement and validate security configurations; experience in cloud and on-premises environments, including AWS.
- Active TS/SCI Clearance or Eligibility.
Nice to have
- Background in systems administration, software development, systems engineering, or deep familiarity with Linux-based systems.
- Understanding of configuration management and automation tools, Git, and vulnerability scanning tools such as Nessus and OpenSCAP.
Pay
USD 120,000–200,000 per-year-salary (base salary)
Tools
NIST SP 800-53, CNSSI 1253, DISA STIGs, eMASS, Xacta, Puppet, Terraform, AWS
Model-written summary · the original posting is authoritative