Senior Endpoint Security Engineer Linux & Tenable Expert

CACI; St. Louis (MO); On-site; USD 75,000 - 158,000; Full time

Job summary

CACI is seeking a Senior Endpoint Security Engineer to manage Tenable Suite on Linux across a large-scale environment supporting NGA missions. The role emphasizes vulnerability management, incident response, and cross‑functional collaboration with IT and security teams.

Candidates should hold TS/SCI clearance, DoD 8570 IAT II certification, and CSSP scope, with extensive Linux and Tenable experience to support enterprise networks on a national security program.

Qualifications

• Active TS/SCI clearance with ability to pass polygraph
• DoD 8570 IAT Level II certification current
• CSSP Infrastructure Support certification within 6 months of hire
• Bachelor's degree in Engineering/CS and 10+ years in Cyber Security (or equivalent)
• Experience with Tenable Suite on Linux and enterprise networks

Responsibilities

• Install, configure, and maintain Tenable products on Linux
• Perform vulnerability scans and prioritize remediation
• Analyze scan results and report to stakeholders
• Collaborate with IT/security teams to remediate findings
• Monitor security alerts and respond to incidents
• Provide user training for Tenable tools
• Maintain performance and security of Tenable environment on Linux
• Configure security products on Linux systems

Skills

Vulnerability management

Linux administration

Security reporting

Team collaboration

Education

Bachelor's degree in Engineering/Computer Science

Tools

Tenable Security Center

Tenable Nessus Scanners

Tenable Nessus Manager

Job description

CACI is seeking a Senior Endpoint Security Engineer to manage Tenable Suite on Linux across a large-scale environment supporting NGA missions. The role emphasizes vulnerability management, incident response, and cross‑functional collaboration with IT and security teams.

Candidates should hold TS/SCI clearance, DoD 8570 IAT II certification, and CSSP scope, with extensive Linux and Tenable experience to support enterprise networks on a national security program.