Principal Security Engineer Fannie Mae CorpPrincipal Security EngineerReston, VADeep knowledge of cloud security architecture, IAM, networking, encryption, logging, monitoring, workload protection, governance, and enterprise network security, including segmentation, firewalls, proxies, VPNs, DNS security, secure web gateways, IPS, load balancing, ZTNA, and SASE. Professional Certifications: Relevant industry certifications such as CISSP, CCSP, PCNSE, AWS Certified Security- Specialty, AWS Certified Advanced Networking- Specialty, Google Professional Cloud Security Engineer, Microsoft Certified: Azure Security Engineer Associate, GIAC certifications, or equivalent credentials.
Senior Principal Engineer - Site Civil Rinker Design AssociatesSenior Principal Engineer - Site CivilBlacksburg, Virginia$150,000–$180,000 / yearThe Senior Principal Engineer is a senior leadership role responsible for technical excellence, strategic growth, and operational oversight within Rinker Design Associates engineering practice. This position combines high-level project leadership, client engagement, and staff development, serving as a key contributor to both regional success and long-term organizational strategy.
Senior Principal Engineer - Water/Wastewater Rinker Design AssociatesSenior Principal Engineer - Water/WastewaterBlacksburg, Virginia$150,000–$180,000 / yearThe Senior Principal Engineer is a senior leadership role responsible for technical excellence, strategic growth, and operational oversight within Rinker Design Associates engineering practice. This position combines high-level project leadership, client engagement, and staff development, serving as a key contributor to both regional success and long-term organizational strategy.
Principal Engineer (BMD) Basic Commerce & Industries IncPrincipal Engineer (BMD)Dahlgren, VAExperience Required: Successful candidates must have a minimum of 20+ years of US Navy surface warfare experience gained while on active duty serving as Line Officer, Limited Duty Officer (LDO) or Chief Warrant Officer (CWO) on carriers, DDGs, CGs, LCS, large deck or smaller amphibious ships, land-based duty stations, etc. Experience may have been gained as a Tactical Action Officer (TAO), BMD Officer (BMDO), Joint Interface Control Officer (JICO) or Interface Control Officer (ICO), Combat Information Center (CIC) Officer, Air Defense (AD) Officer, Anti-Air Watch Coordinator (AAWC).
Principal Digital Signal Processing Engineer Judge GroupPrincipal Digital Signal Processing EngineerLeesburg, VA$160,000–$195,000 / yearBy providing your phone number, you consent to: (1) receive automated text messages and calls from the Judge Group, Inc. and its affiliates (collectively "Judge") to such phone number regarding job opportunities, your job application, and for other related purposes. Reply STOP to opt out of receiving telephone calls and text messages from Judge and HELP for help.
Principal Engineer, Privileged Access Management American International GroupPrincipal Engineer, Privileged Access ManagementReston, VAArchitect integrations between the PAM solution stack and adjacent systems: Entra ID / Active Directory, SIEM/ITDR platforms, cloud IAM (AWS, Azure, GCP), ticketing systems (ServiceNow), and CI/CD pipelines. 10+ years of experience deploying and configuring common Idira PAM (CyberArk) connectors and plug-ins, including Active Directory (AD), Azure AD, servers, databases, mainframe, and other applications as well as creating custom connectors.
Principal Battery Systems Engineer ElectraPrincipal Battery Systems EngineerManassas, VAOur Ultra Short technology unlocks thousands of new operating locations and enables what we call Direct Aviation: quiet, point-to-point regional travel that gets people from where they are to where they want to go, without the congestion of major airports or the noise of conventional aviation. Bachelor's degree in Electrical Engineering, Mechanical Engineering, Aerospace Engineering, or a related discipline with at least 5 years of relevant experience (or equivalent combination of education and experience).
Principal Aerospace Modeling & Simulation Engineer (TS/SCI) MaxaarPrincipal Aerospace Modeling & Simulation Engineer (TS/SCI)Herndon, VirginiaVantor is a place for problem solvers, changemakers, and go-getters—where people are working together to help our customers see the world differently, and in doing so, be seen differently. You will serve as the primary intermediary between customers, program leadership, and modeling teams, translating mission needs and customer objectives into executable technical strategies, program roadmaps, and prioritized action plans.
Engineering Lead / Principal Engineer Kasmo IncEngineering Lead / Principal EngineerAshburn, VARemoteLead and mentor a cross-functional engineering team (Java, PL/SQL, QA, DevOps) with clear ownership, accountability, and delivery focus. Establish prioritization and escalation paths to reduce dependency on senior management and contain escalations within engineering.
Principal/Lead Nuclear Engineer Mpr Associates, Inc.Principal/Lead Nuclear EngineerAlexandria, VirginiaFull timeOversee MPR engineers performing neutronics simulations and core design: criticality safety evaluations, critical core configurations, fuel cycle management, activation calculations, radiation detection and shielding analyses: alarm setpoint determination, shielding optimization, ALARA implementation, dosimetry calculations. The role requires deep expertise in or an ability to quickly master several nuclear engineering related topics, including neutronics, thermal hydraulics, shielding, fuel and nuclear materials, and radiological consequence evaluation combined with strong communication skills, adherence to best practices, and an eye for growing MPR's portfolio.
Principal Systems Test Engineer ElectraPrincipal Systems Test EngineerManassas, VAOur Ultra Short technology unlocks thousands of new operating locations and enables what we call Direct Aviation: quiet, point-to-point regional travel that gets people from where they are to where they want to go, without the congestion of major airports or the noise of conventional aviation. This is a hands-on leadership role - you'll mentor junior engineers, own the architecture of our simulation labs, and build the data management and automated test processes that engineering depends on to move the EL9 toward certification.
NewPrincipal Systems Engineer, Digital Engineering Solutions Modern Government SolutionsPrincipal Systems Engineer, Digital Engineering SolutionsSterling, VAFull timeTITLE: Principal Systems Engineer, Digital Engineering SolutionsLOCATION: Sterling, VA (Relocation assistance considered)CLEARANCE REQUIRED: Active TS/SCI with CI PolyEMPLOYMENT TYPE: Part-Time / As Needed, Onsite POSITION SUMMARYModern Government Solutions (MGS) is seeking a Principal Systems Engineer, Digital Engineering Solutions to lead the architecture, deployment, and sustainment of enterprise engineering platform environments in support of national security missions. Bachelor's degree in Systems Engineering, Computer Science, Computer Engineering, Software Engineering, Information Technology, Electrical Engineering, Mathematics, Physics, or a related field.16+ years of experience architecting, deploying, and sustaining enterprise engineering platforms and IT infrastructure within cloud-hosted environments.
NewPrincipal Systems Engineer (API Gateway) - TS/SCI w CI Poly Modern Government SolutionsPrincipal Systems Engineer (API Gateway) - TS/SCI w CI PolySterling, VAFull timeBachelor's degree in Systems Engineering, Computer Science, Computer Engineering, Software Engineering, Information Technology, Electrical Engineering, Mathematics, Physics, or a related field.16+ years of experience designing, integrating, and supporting enterprise systems, cloud architectures, and API-driven solutions within complex mission environments.5+ years of experience implementing and administering API gateway technologies in cloud-based architectures; Experience designing secure APIs and enterprise integration solutions utilizing REST, GraphQL, event-driven architectures, message queues, streaming platforms, or ETL pipelines. TITLE: Principal Systems Engineer (API Gateway)LOCATION: Sterling, VA (Relocation assistance considered)CLEARANCE REQUIRED: Active TS/SCI with CI PolyEMPLOYMENT TYPE: Full-time, Onsite POSITION SUMMARYModern Government Solutions (MGS) is seeking a Principal Systems Engineer to architect, integrate, and secure mission-critical API ecosystems supporting next-generation national security capabilities.
NewPrincipal Application Engineer (Lending Systems) Navy Federal Credit UnionPrincipal Application Engineer (Lending Systems)Vienna, VAThis individual will manage the architecture and delivery of products and platforms requiring close collaboration with the Technology Product Owner/Managers, Development Leads, Business Product Owners in consumer lending, vendors, and dependent platform and product teams. Experience in systems engineering at the enterprise level including the analysis and design of cloud and distributed system architectures, preferably within the financial services or fintech sectors supporting modernization initiatives.
Principal Autonomous Navigation Engineer Blue OriginPrincipal Autonomous Navigation EngineerReston, Virginiaand/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing, vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. Required for Certain Job Profiles: Drivers who operate Commercial Motor Vehicles with a Gross Vehicle Weight (GVW), Gross Vehicle Weight Rating (GVWR) or combination of power unit and trailer that meets or exceeds 10,001 lbs.
Principal Aerospace Modeling & Simulation Engineer (TS/SCI) VantorPrincipal Aerospace Modeling & Simulation Engineer (TS/SCI)Herndon, VirginiaVantor is a place for problem solvers, changemakers, and go-getters—where people are working together to help our customers see the world differently, and in doing so, be seen differently. You will serve as the primary intermediary between customers, program leadership, and modeling teams, translating mission needs and customer objectives into executable technical strategies, program roadmaps, and prioritized action plans.
Principal ELINT Processing Engineer HawkEye 360Principal ELINT Processing EngineerHerndon, Virginia$170,000–$220,000 / yearThis senior technical role requires an exceptional combination of deep ELINT domain expertise, software systems integration experience, and proven leadership in driving complex development efforts. ELINT Systems Leadership : Serve as the principal technical authority on ELINT processing systems, providing strategic direction for system architecture, algorithm development, and capability enhancements.
NewPrincipal Solution Engineer On.EnergyPrincipal Solution EngineerReston, VASuccess requires strong system level thinking across electrical, mechanical, and software (EMS) domains, along with the communication and interpersonal skills to align stakeholders across Sales, Engineering, and Product. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets.
Principal Reverse Engineer Webster & Webster AssociatesPrincipal Reverse EngineerChantilly, VirginiaKey Responsibilities Direct and mentor engineering teams through complex reverse engineering cycles to ensure high-impact project delivery. Design sophisticated exploits to validate security gaps, demonstrating risks like privilege escalation or unauthorized code execution.
NewPrincipal RF/DSP Engineer AeroVironment IncPrincipal RF/DSP EngineerLeesburg, VA$153,500–$234,250 / yearGiven only a newly encountered drone/controller pair and complex-IQ recordings, this engineer will independently frame the problem, generate and rank hypotheses, design the experiment campaign, characterize the waveform, develop the algorithms, implement them in production C++, and validate performance against real-world RF data - without needing the approach handed to them. Our line-of-bearing capability needs a strong technical owner, and this engineer will drive its improvement: antenna-array signal processing, bearing estimation, array calibration, and the practical realities of DF performance in the field - mutual coupling, multipath, platform effects, and coherent multichannel capture.