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Job Title: Principal Cybersecurity Engineer (Linux)
Company Name: General Dynamics IT
Location: McLean, VA
Position Type: Full Time
Post Date: 02/27/2026
Expire Date: 03/31/2026
Job Categories: Engineering, Information Technology
Job Description
Principal Cybersecurity Engineer (Linux)

GDIT is seeking a Cybersecurity Engineer to support a large Cloud Services government contract to run and maintain our customer cyber tool stack in McLean, VA.

HOW A CYBERSECURITY ENGINEER WILL MAKE AN IMPACT:

  • Maintains, configures, and monitors the following security applications:

    • Endpoint security implementation

    • Scanning implementation

    • SIEM implementation

    • Insider Threat Monitoring

  • Works with the vendors of the security applications as applicable to maintain security updates, licenses, resolve support issues (e.g., for Tenable plugins), etc.

  • Supports the Cybersecurity lead with maintaining the Continuous Monitoring program, specifically around vulnerability management, endpoint security, auditing, and security alert triage/monitoring.

  • For the SIEM/SecOps, works with the team to perform the following duties:

    • Ensures the telemetry from the hosts and security applications are forwarded to the SIEM.

    • Configures alerts for privileged activity that would be conducted in the enclave as well as alerts from security advisories.

    • Triages all alerts from the SIEM to ensure activity in the environment is authorized.

    • Investigates, resolves, and reports security incidents in alignment with the Incident Response Plan.

  • For scanning, works with the team to perform the following duties:

    • Ensures the inventory of hosts and recurring/ad-hoc scan policies are accurate.

    • Reviews the scans to confirm correct, actionable data is generated to support the patching activities.

  • For endpoint security, works with the team to perform the following duties:

    • Ensures new hosts go through the applicable learning phase before going live.

    • Ensures all hosts can be seen in the endpoint security application with ongoing monitoring and applicable policies applied.

  • For insider threat monitoring, works with the team to administer the security application and monitor aggregated data.

  • Designs, develops, tests, and evaluates information system security throughout the systems development life cycle.


WHAT YOULL NEED TO SUCCEED - REQUIRED :

  • Clearance: Active Top Secret security clearance with SCI eligibility

  • Education: BA/BS or similar Degree, OR equivalent experience in lieu of degree

  • Experience: Minimum of 10 years of experience in supporting US government systems, emphasis on DO

  • Technical Skills: Experience with using or maintaining 2 or more of the cyber tools listed below, AND the ability to quickly learn those that are unfamiliar:

    • Splunk

    • Tenable.sc

    • Trellix

    • Teramind

  • Skills & Abilities: Excellent communication and interpersonal skills, with the ability to work effectively in a fast-paced, collaborative environment.

  • Location: McLean, VA - onsite at customer location

DESIRED SKILLS:

  • Certifications that meet applicable 8140 compliance, including but not limited to Security+ CE

  • Proficiency in Google Workspace and related tools

GDIT IS YOUR PLACE:

  • 401K with company match

  • Comprehensive health and wellness packages

  • Internal mobility team dedicated to helping you own your career

  • Professional growth opportunities including paid education and certifications

  • Cutting-edge technology you can learn from

  • Rest and recharge with paid vacation and holidays

#GDITcareers

#OpportunityOwned

#WeAreGDIT

#transitioningmilitary

#clearedjobs

#veterans

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Contact Information
Company Name: General Dynamics IT
Website:https://www.gdit.com/careers/job/1f6f99aec/principal-cybersecurity-engineer-linux/?source=AutoAppend_HBCU
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