Senior Cyber Security Engineer

Job Title:

Senior Cyber Security Engineer Job Category:
Information Technology Time Type:
Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type:
Regular Percentage of

Travel Required:

Up to 10%
Type of Travel:
Local*
*
* The Opportunity:

We are seeking a Senior Cyber Security Engineer to join our team in Chantilly, VA. In this role, you will help protect mission‑critical enterprise environments by supporting specialized cybersecurity applications, advancing system security, and enhancing operational efficiency. You will work closely with technical teams and customers to strengthen cybersecurity capabilities, automate workflows, and ensure secure, reliable operations across the enterprise. If you thrive in a dynamic environment and enjoy solving complex challenges, this is an exciting opportunity to make a meaningful impact.

Responsibilities:

Provide engineering support and system administration for cybersecurity applications, including installation, configuration, maintenance, patching, and backup/restore.

Develop, customize, and manage scan policies, audit files, scan jobs, dashboards, reports, and related content for tools such as Tenable Nessus and Service Now integrations.

Deliver Tier 2 and Tier 3 support for cybersecurity technologies and ensure compliance with customer policies, procedures, and TASKORDs.Troubleshoot vulnerability scanning issues and provide responsive support via phone, email, and messaging platforms.

Identify opportunities for process automation and integrate scripted solutions to streamline repetitive tasks and metrics collection.

Support Assessment & Authorization (A&A) activities by updating documentation, preparing security artifacts, and resolving technical conflicts.

Analyze policies, customer feedback, and operational workflows to recommend enhancements that improve efficiency and cybersecurity posture.

Qualifications:

Required:

Active TS/SCI clearance with polygraph.

Bachelor’s degree or 4+ years of additional relevant experience.
5+ years of experience working with cybersecurity tools in an enterprise environment.

Hands‑on experience with Tenable products and enterprise vulnerability scanning operations.

Strong knowledge of Windows and Linux administration, operating system hardening, TCP/IP networking, and core network security concepts.

Demonstrated expertise in enterprise scanning, continuous monitoring, host/network defense, and intrusion detection.

Ability to translate functional cybersecurity needs into technical requirements and apply architectural principles such as defense‑in‑depth and resilience.

Excellent communication, organization, troubleshooting, and customer‑support skills.

Active IAT Level II certification, or the ability to obtain it within 30 days of hire.

Desired:

Experience with AWS services and Service Now.

Familiarity with federal cybersecurity frameworks such as NIST SP 800‑37 (RMF) and NIST SP 800‑137 (Continuous Monitoring).Experience developing automation and scripting solutions to support workflow optimization.

Ability to perform effectively in a fast‑paced environment while managing multiple priorities.

Strong collaboration skills with the ability to work independently or as part of a team.

This position is contingent on funding and may not be filled immediately. However, this position is representative of positions within CACI that are consistently available. Individuals who apply may also be considered for other positions t You Can Expect: A culture of integrity.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An…