Senior Cyber Security Engineer

CACI International•Chantilly, VA

3d•$103,800 - $218,100

About The Position

CACI is seeking a Senior Cyber Security Engineer to join its team in Chantilly, Virginia. The role supports mission-critical enterprise environments by providing engineering and system administration for specialized cybersecurity applications, advancing system security, and improving operational efficiency. The engineer works with technical teams and customers to strengthen cybersecurity capabilities, automate workflows, and maintain secure, reliable enterprise operations. The position requires an active TS/SCI clearance with polygraph and is contingent on funding; it may not be filled immediately.

Requirements

Active TS/SCI clearance with polygraph.
Bachelor’s degree or at least four years of additional relevant experience.
At least five 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 and 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 ability to obtain it within 30 days of hire.

Nice To Haves

Experience with AWS services and ServiceNow.
Familiarity with federal cybersecurity frameworks, including NIST SP 800-37 (RMF) and NIST SP 800-137 (Continuous Monitoring).
Experience developing automation and scripting solutions to optimize workflows.
Ability to work effectively in a fast-paced environment while managing multiple priorities.
Strong collaboration skills and ability to work independently or as part of a team.

Responsibilities

Provide engineering support and system administration for cybersecurity applications, including installation, configuration, maintenance, patching, and backup and restoration.
Develop, customize, and manage scan policies, audit files, scan jobs, dashboards, reports, and related content for tools such as Tenable Nessus and ServiceNow integrations.
Provide 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 by phone, email, and messaging platforms.
Identify process automation opportunities and integrate scripted solutions to streamline repetitive tasks and metrics collection.
Support Assessment and Authorization (A&A) activities by updating documentation, preparing security artifacts, and resolving technical conflicts.
Analyze policies, customer feedback, and operational workflows to recommend improvements to efficiency and cybersecurity posture.