Cybersecurity Engineer - ISSO

Cybersecurity Engineer - ISSO

Job ID: 2615385

Location: St. Louis, MO, United States

Date Posted: Aug 7, 2026

Category: Cyber

Subcategory: Cyberspace Ops

Schedule: Full-Time

Shift: Day Job

Travel: Yes - 10% of the time

Minimum Clearance Required: TS/SCI with Poly

Clearance Level Must Be Able to Obtain: None

Potential for Remote Work: On-Site

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Job Description

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.

Overview

SAIC accepts applications on an ongoing basis and there is no deadline.

SAIC is a premier mission integrator focused on advancing the power of technology and innovation to serve and protect our world. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. We integrate emerging technology, rapidly and securely, into mission critical operations that modernize and enable critical national imperatives.

We are approximately 23,000 strong; driven by mission, united by purpose, and inspired by opportunities. SAIC is an Equal Opportunity Employer. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.3 billion. For more information, visit saic.com. For ongoing news, please visit our newsroom.

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