Senior Endpoint Security Engineer TS/SCI Nessus/Linux

CACI International Inc; St. Louis (MO); On-site; USD 95,000 - 158,000; Full time

Job summary

CA CI International Inc. is seeking a Senior Endpoint Security Engineer with a TS/SCI clearance to manage Tenable Suite on Linux and lead vulnerability management for NGA-related endpoints.

The role focuses on administering Security Center, Nessus Scanners, and Nessus Manager in a high‑tempo, DoD‑aligned environment. You will work within the Transport & Cybersecurity Services (TCS) program on a TS/SCI cleared team, contributing to enterprise security across DoD networks and geospatial missions.

Qualifications

• TS/SCI clearance (current). As a post-hire requirement, selected candidate must be able to pass and maintain a Government polygraph.
• DoD 8570 IAT Level II certified (current).
• Must obtain a CSSP Infrastructure Support certification within 6 months of hire date.
• Bachelor's degree in Engineering, Computer Science or related field with 10 years of cyber security experience.
• Hands-on experience with Tenable Suite: Security Center, Nessus Scanners, Nessus Manager; Linux administration.

Responsibilities

• Install, configure, and maintain Tenable Security Center, Nessus Scanners, and Nessus Manager on Linux.
• Perform regular vulnerability scans and assessments across the network.
• Analyze scan results and prioritize vulnerabilities by severity and impact.
• Collaborate with IT and security teams to remediate identified vulnerabilities.
• Generate and distribute vulnerability reports to stakeholders.
• Monitor security alerts and respond to incidents in a timely manner.

Skills

TS/SCI clearance

IAT Level II certification

CSSP Infrastructure

Vulnerability management

Linux proficiency

Education

Bachelor's degree in Engineering/Computer Science or related field

Tools

Tenable Security Center

Nessus Scanners

Nessus Manager

Linux

Job description

CA CI International Inc. is seeking a Senior Endpoint Security Engineer with a TS/SCI clearance to manage Tenable Suite on Linux and lead vulnerability management for NGA-related endpoints.

The role focuses on administering Security Center, Nessus Scanners, and Nessus Manager in a high‑tempo, DoD‑aligned environment. You will work within the Transport & Cybersecurity Services (TCS) program on a TS/SCI cleared team, contributing to enterprise security across DoD networks and geospatial missions.