• Fannie Mae (Reston, VA)
    …maintaining hardware, technology, and/or processes. *THE IMPACT YOU WILL MAKE* The * Principal Engineer (Director IC), Exchange Platform (APIs, Files, AI ... requirements, design, and operational information * Ability to frame ideas as systems and analyzing the inputs, outputs, and process Tools * Skilled in Excel *… more
    DirectEmployers Association (10/17/25)
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  • Fannie Mae (Reston, VA)
    …platforms, software, and applications. *THE IMPACT YOU WILL MAKE* The Platform Engineering, Principal Engineer (Director IC) role will offer you the flexibility ... design, and operational information * Experience monitoring and managing operation systems (OS), and staying current on patches, upgrades, and other elements of… more
    DirectEmployers Association (08/22/25)
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  • Washington Metropolitan Area Transit Authority (Greenbelt, MD)
    …fire, operational emergencies or related events. **SUMMARY** The Vehicle Engineer is responsible for ensuring the design and maintenance integrity of rail ... Vehicle Engineer (RAIL) Job ID: 250945 Location: MD -...+ Tests vehicles using various test and data acquisition systems to evaluate operational performance parameters. +… more
    DirectEmployers Association (10/28/25)
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  • Principal Systems Engineer

    RTX Corporation (Sterling, VA)
    …a security clearance **Security Clearance:** DoD Clearance: Top Secret ** Principal Systems Engineer ** **- Operational Expert** This position is within ... and Services (SS&S) business area. SS&S develops and builds simulators and training systems for both military and commercial customers, with the primary focus being… more
    RTX Corporation (11/04/25)
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  • Principal Network Systems

    Saliense Consulting (Arlington, VA)
    …the design, implementation, documentation, and troubleshooting of the enterprise server environment. The Principal Systems Engineer must have the ability to ... package. Saliense is now hiring a Senior Technical Consultant ( Principal Network Systems Engineer ) to...and Lambda + Experience supporting Cloud Architects to provide operational network architectures to meet mission system and development… more
    Saliense Consulting (10/01/25)
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  • Systems Test Engineer

    Northrop Grumman (Chantilly, VA)
    …Mission Systems ** is seeking a candidate to fill a ** Systems Test Engineer / Principal Systems Test Engineer ** position. This position will ... tasking dictated by the customer's mission and a 24/7/365 operational tempo managed by Internal Product Team (IPT) leads...kits. This requisition may be filled at either the ** Systems ** **Test Engineer ** or ** Principal **… more
    Northrop Grumman (10/23/25)
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  • Principal Mechanical Air-Cooling…

    Amazon (Herndon, VA)
    …of air handling infrastructure for our data centers. AWS is seeking a Principal , Mechanical Engineer for our team developing new infrastructure solutions that ... is driving rapid innovation in mechanical cooling and controls systems used by AWS. Our designs are fundamentally changing...to industry advancement A day in the life A Principal , Mechanical Engineer for Air-Cooled Solutions works… more
    Amazon (10/24/25)
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  • Space Principal /Sr. Principal

    Northrop Grumman (Dulles, VA)
    …Write status and technical performance reviews, analyses and reports **Basic Qualifications:** + ** Principal Systems Engineer ** - Bachelors of Science degree ... will also include responsibilities relating to integration, testing, and operational readiness of spacecraft and payloads. Candidate may be...3+ years of experience; or a PhD + **Sr. Principal Systems Engineer ** - Bachelors… more
    Northrop Grumman (10/31/25)
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  • Principal Elasticsearch Systems

    Leidos (Bethesda, MD)
    **Description** **Leidos** has a new and exciting opportunity for a ** Principal ** **Elasticsearch Systems Engineer ** in our **National Security Sector's ... more. **Join us and make a difference in National Security!** **Job Summary** The Principal Elasticsearch Systems Engineer role provides support across an… more
    Leidos (10/30/25)
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  • Principal /Sr Principal

    Northrop Grumman (Dulles, VA)
    …Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations ... history. We have an opening for an Embedded Software Engineer to join our team of qualified, diverse individuals...our team of qualified, diverse individuals in the Space Systems organization developing space flight software platforms for NSS… more
    Northrop Grumman (09/30/25)
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  • Principal Systems Engineer

    RTX Corporation (Springfield, VA)
    …problems that create a safer, more secure world. Raytheon Technologies is seeking a Principal Systems Engineer (MBSE) to provide enterprise-wide systems ... within the Intelligence Community. The ideal candidate will apply Model-Based Systems Engineering (MBSE) and Digital Engineering practices to define system… more
    RTX Corporation (10/13/25)
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  • Software Systems Engineer

    The MITRE Corporation (Mclean, VA)
    …and enterprise architecture. Roles & Responsibilities: MITRE seeks an accomplished, proactive Principal Systems Engineer capable of serving as deputy ... of functions related to project and program management, acquisition strategies, systems engineering, and data-driven decision-making. The department is adept at… more
    The MITRE Corporation (11/01/25)
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  • CCSS Principal Systems

    RTX Corporation (Washington, DC)
    …a safer, more secure world. Raytheon Field Engineering is anticipating an opportunity for a ** Principal Systems Engineer ** . This role is suited for a ... in Washington, DC and involves supporting the WHCA Secure Voice Network (WHSVN) C2 systems and acquisition projects. These efforts are in support of the Command and… more
    RTX Corporation (09/19/25)
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  • Principal OR Senior Principal Field…

    Northrop Grumman (Washington, DC)
    …Our employees are not only part of history, they're making history. Northrop Grumman Aeronautics Systems is looking to add a ** Principal OR Senior Principal ... our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today,...location. _This position can be filled at either the Principal Field Service Engineer - Network and… more
    Northrop Grumman (09/17/25)
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  • Principal Mechanical Engineer

    Amazon (Herndon, VA)
    …critical design decisions, evaluating trade-offs, and managing technical risks across complex mechanical systems . As a principal engineer , you will influence ... that fundamentally reshape data center operations while delivering measurable operational and financial benefits. You will own complex, ambiguous... systems A day in the life A Principal , Mechanical Engineer for Liquid Cooling works… more
    Amazon (10/29/25)
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  • Principal /Sr Principal Fault…

    Northrop Grumman (Dulles, VA)
    …not only part of history, they're making history. Northrop Grumman is hiring a qualified Principal /Sr. Principal Systems Engineer to support a National ... concepts to either technical or nontechnical audiences is required. **Basic Qualifications:** + ** Principal Systems Engineer ** - Bachelors of Science degree… more
    Northrop Grumman (09/19/25)
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  • Principal Engineer (Project…

    Fairfax County Sheriff's Office (Fairfax, VA)
    Principal Engineer (Project Coordinator) Print (https://www.governmentjobs.com/careers/fairfaxcounty/jobs/newprint/5102969) Apply  Principal Engineer ... design industry, with at least 3 years in a leadership role as a senior engineer or principal in leading commercial building MEP+ design and strategy for public… more
    Fairfax County Sheriff's Office (11/01/25)
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  • Senior Principal Software Engineer

    Mastercard (Arlington, VA)
    …strategies and decisions. All About You: * Proven experience as a Senior Principal Engineer or equivalent in enterprise data architecture, data engineering, or ... and governments realize their greatest potential._ **Title and Summary** Senior Principal Software Engineer , Data Architecture Overview: Mastercard's Data &… more
    Mastercard (10/17/25)
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  • Principal RF Engineer

    Leidos (Arlington, VA)
    …engineers, systems engineers, software/firmware engineers, scientists, etc.). The ** Principal RF Engineer ** will direct the design and development ... at the forefront of researching, designing, and developing EW systems , directed energy systems , high speed/hypersonic weapon...nation's defense.** We currently have an opening for a ** Principal RF Engineer ** to work with a… more
    Leidos (08/30/25)
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  • Principal RF Engineer

    CACI International (Springfield, VA)
    Principal RF Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: TS/SCI Employee Type: Regular Percentage of Travel ... Continental US * * * CACI is hiring a Principal Electrical Engineer that will Leads project...worldwide to install, maintain and upgrade complex electronic mission systems , security systems and antennas. You will… more
    CACI International (10/31/25)
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