• Senior Security Engineer

    CoStar Realty Information, Inc. (Arlington, VA)
    Senior Security Engineer Job Description **Overview** CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate ... As the security section grows, so will the tools and the **Senior Security Engineer ** will be the person charged with implementing them. The successful… more
    CoStar Realty Information, Inc. (10/24/25)
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  • Senior Cyber Security Engineer

    ManTech (Chantilly, VA)
    …, and virtualized systems . + Strong understanding of Windows and Linux systems , operating system security principles, TCP/IP networking, 802.1x, and core ... **MANTECH** seeks a motivated, career and customer-oriented **Senior Cyber Security Engineer ** to join our team in **Chantilly, VA.** This role supports a… more
    ManTech (12/13/25)
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  • Lead Security Engineer

    Foxhole Technology, Inc (Alexandria, VA)
    **Overview** **Job Title: Lead Security Engineer ** **Clearance: Top Secret w/SCI eligibility** **Location: Alexandria, VA** **Start: Based on Contract Award** ... the world **.** We are seeking a mission-focused Lead Security Engineer to support a Department of...detection, recovery, or reporting activities. + Familiarity with performing security assessments for all IT systems , to… more
    Foxhole Technology, Inc (12/19/25)
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  • Cyber Network Security Engineer

    CACI International (Chantilly, VA)
    Cyber Network Security Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular ... Travel: None * * * **The Opportunity:** **CACI is seeking a talented Cyber Network Security Engineer to join our team in Chantilly, VA. This role will**… more
    CACI International (12/02/25)
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  • Staff Information Security Engineer

    Zscaler (Mclean, VA)
    …and agility with a cloud-first strategy. We are looking for a Staff Information Security Engineer who will operate as a vulnerability management engineer ... cybersecurity. Our Engineering team built the world's largest cloud security platform from the ground up, and we keep...SCIF, with no access to external networks or corporate systems , and adhering to one-way diode transfer protocols.** Reporting… more
    Zscaler (10/11/25)
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  • Network Security Engineer III

    TekSynap (Virginia Beach, VA)
    …and management of firewalls and IDS/IPS technologies. **Overview** We are seeking a Network Security Engineer III to join our team supporting Department of Navy. ... across hardware, software, and network components. + Conduct STIG implementation to ensure systems meet DoD security compliance standards. + Configure and manage… more
    TekSynap (12/30/25)
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  • Principal Cyber Security Engineer

    ManTech (Chantilly, VA)
    systems , and virtual systems + Knowledge of Windows and Linux systems , general operating system security practices, TCP/IP networking, 802.1x, and ... **MANTECH** seeks a motivated, career and customer-oriented **Principal Cyber Security Engineer ** to join our team in **Chantilly, VA.** This role supports the… more
    ManTech (12/13/25)
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  • Lead Security Engineer

    Foxhole Technology, Inc (Leesburg, VA)
    **Overview** **Job Title: Lead Security Engineer ** **Clearance: Secret** **Location: Leesburg, VA -Hybrid (Onsite 3 days per week)** Foxhole Technology provides ... services and solutions that solve operational gaps, operate critical systems , and protect and secure the enterprise - across...the world **.** We are seeking a mission-focused Lead Security Engineer to support a Department of… more
    Foxhole Technology, Inc (12/19/25)
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  • Cyber Security Engineer (Elastic…

    CACI International (Hampton, VA)
    Cyber Security Engineer (Elastic SME) Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI Employee Type: ... **The Opportunity:** Join our dynamic team as a Cyber Security Engineer at the DCGS Management Center...of our Elasticsearch cluster, ensuring the health, status, and security monitoring of our systems . If you… more
    CACI International (12/24/25)
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  • Senior Principal Cyber Security

    ManTech (Chantilly, VA)
    systems , and virtual systems + Knowledge of Windows and Linux systems , general operating system security practices, TCP/IP networking, 802.1x, and ... **MANTECH** seeks a motivated, career and customer-oriented **Senior Principal Cyber Security Engineer ** to join our team in **Chantilly, VA.** This role… more
    ManTech (12/13/25)
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