• Senior Offensive Security Engineer

    CoStar Realty Information, Inc. (Arlington, VA)
    Senior Offensive Security Engineer Job Description **Offensive Security Engineer ** **Overview** CoStar Group (NASDAQ: CSGP) is a leading global provider ... of total experience in a technical role such as security , networking, systems , or software development +...C2 Frameworks like Cobalt Strike, Sliver, and Mythic + Windows Active Directory exploitation tools and techniques + Knowledge… more
    CoStar Realty Information, Inc. (11/24/25)
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  • IT Systems Engineer

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated, career and customer-oriented **IT Systems Engineer ** to join our team in **Chantilly, VA.** **Responsibilities include but are not ... infrastructure resources (eg storage and networking), and how to configure operating systems and applications in an efficient manner. + Maintaining platforms of… more
    ManTech (11/19/25)
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  • Principal Cyber Security Engineer

    ManTech (Chantilly, VA)
    …, and virtual systems + Knowledge of Windows and Linux systems , general operating system security practices, TCP/IP networking, 802.1x, and network ... **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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  • Systems Engineer III

    Noblis (Chantilly, VA)
    …C2S) implementation with security controls for classified workloads + Linux and Windows operating systems with security hardening for classified use + ... Responsibilities As a ** Systems Engineer III** you will provide...and integration functions across multi-enclave environments. + Implement comprehensive systems security strategies ensuring all systems more
    Noblis (12/22/25)
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  • Cyber Systems Engineer - level 2

    Northrop Grumman (Dulles, VA)
    …is 100% onsite and cannot accommodate telecommute work. A _Cyber Systems Security Engineering_ position requires demonstrated technical accomplishments in ... subsystem + Perform Attack Surface Analysis (ASA) and prepare Systems Security Plan (SSP) documentation for complex...system vulnerability scanning, remediation, and patch management activities on Windows and Red Hat operating systems and… more
    Northrop Grumman (12/02/25)
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  • Network Management Systems Engineer

    Leidos (Fort Belvoir, VA)
    **Description** Leidos is seeking a Network Management Systems (NMS) Engineer at Fort Belvoir, VA to support operations on a large, high-profile DOD contract. ... procedures, and best practices. + Collaborate with cross-functional IT teams (network, systems , security , DevOps) to ensure accurate monitoring coverage. +… more
    Leidos (12/24/25)
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  • Principal Systems Engineer

    Northrop Grumman (Chantilly, VA)
    …+ Participate in test events This requisition will be filled at the **Principal Systems Engineer ** level. **Basic Qualifications for Principal Systems ... generator, oscilloscope, multi-meter, spectrum analyzers, etc. + Knowledge and familiarity with Windows and Linux Operating Systems , specifically the ability to… more
    Northrop Grumman (12/19/25)
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  • Security Engineer

    Leidos (Lorton, VA)
    **Description** The Digital Modernization Sector at Leidos currently has an opening for a Security Engineer to work in our Lorton, VA office. This is an exciting ... to deliver cybersecurity and information assurance services. **Primary Responsibilities** The Security Engineer - Linux / Tenable Compliance is responsible for… more
    Leidos (12/11/25)
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  • 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 Principal Cyber Security

    ManTech (Chantilly, VA)
    …, and virtual systems + Knowledge of Windows and Linux systems , general operating system security practices, TCP/IP networking, 802.1x, and network ... **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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