Cybersecurity Engineer - ISSO

St. Louis, MO – Full-Time, Day Shift – Travel up to 10% of the time – On-site

About the role

SAIC is seeking a Cyber Security Engineer to support critical DoD and Intelligence Community missions. You will lead assessment, authorization, vulnerability management, and secure operations for classified systems.

Responsibilities

• Execute RMF processes for Assessment & Authorization (A&A).
• Develop and maintain SSPs, POA&Ms, SARs, and ATO artifacts in XACTA/eMASS.
• Conduct vulnerability scanning and track remediation using ACAS/IAVM.
• Implement and validate NIST 800-53 and CNSSI 1253 controls.
• Support hardening, patching, and STIG compliance for Windows, Linux, and networks.
• Monitor systems and assist with incident response.
• Evaluate security impacts of system changes.
• Collaborate with engineering, administration, and DevSecOps teams.

Requirements

• Active TS/SCI clearance with polygraph (must already possess).
• Bachelor’s degree plus 5 years of experience (or equivalent).
• DoD 8570 IAT II+ certification (Security+, CySA+, CISSP, etc.).
• Hands-on RMF, POA&M, and ATO documentation experience.
• Experience with ACAS and IAVM tracking.
• Knowledge of STIGs, patching, and system hardening.
• Familiarity with NIST publications and incident-response processes.
• Strong analytical and communication skills.

Skills

• Scripting (Python, Java, React).
• DevSecOps pipeline experience.
• Linux/Windows, databases, or web application experience.
• Familiarity with Agile tools (Jira, Confluence).
• Experience with NIST SP 800-171.