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.