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# Endpoint Security Engineer III - Nessus

- **Company:** CACI International Inc.
- **Location:** Springfield, VA, United States
- **Experience:** Expert
- **Salary:** $75,200.0 - $158,100.0
- **Contract:** Permanent contract
- **Skills:** Cyber Security, System Configuration, Linux, Python (Programming Language), Network Architecture, Windows PowerShell, Software Vulnerability Management, Scripting, Information Technology, Tenable Nessus, Nessus
- **Published:** August 28, 2026
- **Apply:** https://www.techcareers.com/job.asp?id=3367881285&tx=KJ1919FFG&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54

## About the Role

* TS/SCI clearance (current). As a post-hire requirement, selected candidate must be able to successfully 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 (Engineering, Computer Science or related field) and ten (10) years of technical experience in Cyber Security. Additional experience may be considered in lieu of a degree.
 * Working knowledge of maintaining Enterprise Cyber Security Engineering requirements utilizing all or some of the following tools: Tenable Suite that include Security Center, Nessus Scanners, Nessus Manager with hands-on administrator experience
 * Strong working knowledge of Linux operating systems, including installation, configuration, and maintenance - Experience with large-scale enterprise/global networks in a high-paced, diverse environment
 * Understanding of and experience with the DoD Architecture Framework and other key DoD network architecture and strategic planning instructions
 * Experience in providing status reports and products to senior management and customers
 * Experience with plans, designs, and evaluations of security systems and architectures

Desired:

 * CSSP Infrastructure Support certification
 * Any Linux related certifications
 * Familiarity with scripting languages (e.g., Python, PowerShell) for automation tasks

## Description

We are seeking a highly skilled Tenable product Administrator with hands-on experience in Linux platforms to join our team. The ideal candidate will be responsible for managing and administering our Tenable Suite environment, as well as configuring and maintaining them on Linux systems. This role requires a deep understanding of vulnerability management, security protocols, and the Tenable product suite, with a strong focus on Linux-based installation.

 * Install, configure, and maintain the Tenable Security Center, Tenable Nessus Scanners, and Tenable Nessus Managers on Linux platforms.
 * Perform regular vulnerability scans and assessments across the organization's network using Tenable products
 * Analyze scan results and prioritize vulnerabilities based on 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.
 * Stay updated on the latest security threats and vulnerabilities.
 * Provide training and support to users on the Tenable Security Center, Tenable Nessus Scanners, and Tenable Nessus Managers on Linux
 * Ensure the optimal performance and security of the Tenable environment on Linux platforms
 * Configure and install various security products utilizing Linux OS.


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