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# Security Engineer, Vulnerability Management (ACAS/Tenable.sc) - Secret clearance

- **Company:** THE PODMILSAK GROUP, INC.
- **Location:** Oklahoma City, OK, United States
- **Experience:** Expert
- **Salary:** $130,000 - $160,000
- **Contract:** Temporary contract
- **Skills:** Microsoft Windows, Computing Platforms, Cloud Computing, CompTIA Security+, Cyber Security, Linux System Administration, Software Vulnerability Management, SC Clearance, Nessus, Vulnerability Analysis
- **Published:** November 14, 2026
- **Apply:** https://www.careerbuilder.com/job-details/security-engineer-vulnerability-management-acas-tenable-sc-secret-clearance-oklahoma-city-ok--cd81270d-c296-410a-8d26-8a7958d8445c

## About the Role

Secret Clearance, Computer Security, Computer Security, Secret Clearance, United States Department of Defense (DoD), Linux Administration, Vulnerability Scanners, Security Analysis, Microsoft Windows System Administration, Nessus, This is a hands-on role that combines deep Tenable platform expertise with Windows/Linux administration, vulnerability analysis, system hardening, and cross-team collaboration. The ideal candidate will have experience working in a DoD or federal environment and be comfortable managing vulnerability scanning and remediation across complex enterprise environments., * 5+ years of experience in vulnerability management, information assurance, or systems security, preferably within a DoD or federal environment.

 * Hands-on experience administering Tenable.sc, Nessus, and ACAS in a DoD or federal environment.
 * Working knowledge of DoD STIGs, CKLs, and RMF processes.
 * Strong Windows and Linux administration experience.
 * Active DoD Secret clearance required; clearance must be current and verifiable.
 * DoD 8570/8140 IAT Level II baseline certification required, such as:
*

 + CompTIA Security+ CE
 + CySA+
 + GSEC
 + SSCP
 + CCNA-Security
 * Strong written and verbal communication skills with the ability to collaborate effectively across technical teams.

## Description

PGTEK is seeking a Security Engineer, Vulnerability Management with a Secret clearance (or higher) to administer and optimize our Tenable.sc/ACAS environment, drive vulnerability remediation across enterprise systems, and support compliance with DoD STIG and RMF requirements., Tenable Security Center / ACAS

 * Administer and optimize Tenable.sc and Nessus, including scan policies, scan zones, repositories, credentials, and audit files.
 * Perform credentialed vulnerability scans, STIG compliance scans, discovery scans, and port scans.
 * Analyze and interpret STIGs, CKLs, ACAS/Tenable findings, and vulnerability results to support compliance and risk reduction.
 * Leverage Windows and Linux administration skills to support and troubleshoot authenticated vulnerability scanning.
 * Conduct false-positive analysis and validation to ensure accurate vulnerability reporting.
 * Collaborate with Cloud, Network, Platform, Security, and Engineering teams to drive vulnerability remediation and system hardening., * Identify and close gaps in vulnerability scan coverage to ensure comprehensive visibility across the environment.
 * Perform asset discovery and maintain accurate inventories to ensure all in-scope systems are included in scanning cycles.
 * Analyze scan results to identify coverage gaps, unscanned assets, and compliance blind spots.
 * Recommend corrective actions to improve vulnerability visibility, scanning effectiveness, and overall security posture