Cybersecurity Engineer - ISSO

Job ID: 2615385

Location: St. Louis, MO, US

Date Posted: 2026-08-07

Category: Cyber

Subcategory: Cyberspace Ops

Schedule: Full-Time

Shift: Day Job

Travel: Yes - 10% of the time

Minimum Clearance Required: TS.SCI_wPoly

Clearance Level Must Be Able to Obtain: None

Potential for Remote Work: ORA_ON_SITE

Description

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/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, 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.

Qualifications

Required Qualifications

• Active TS/SCI clearance. Candidates must have this clearance to be considered.
• Willing and able to pass a polygraph.
• Bachelor’s degree 5 years of experience (or equivalent).
• Active or Current TS/SCI.
• DoD 8570 IAT II (Security , CySA , CISSP, etc.).
• Hands‑on RMF, POA&M, ATO documentation experience.
• Experience with ACAS, IAVM tracking.
• Knowledge of STIGs, patching, system hardening.
• Familiarity with NIST publications and incident‑response processes.
• Strong analytical and communication skills.

Desired Qualifications

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