Principal Geotechnical/CMT Engineer - Annapolis Junction, MD Hillis-Carnes Engineering Associates IncPrincipal Geotechnical/CMT Engineer - Annapolis Junction, MDAnnapolis Junction, MDDuties may include but are not limited to; general geotechnical engineering practice including the preparation of geotechnical reports/calculation, technical support of field staff, review of construction inspection daily field reports, and occasional project site field visits related to the projects you are involved in. Candidate will work with our geotechnical and materials testing/inspections departments and be responsible for a wide variety of projects for public and private sector clients.
AP110 Principal Software Systems Engineer / Full-Stack Architect SupportAP110 Principal Software Systems Engineer / Full-Stack ArchitectGreenbelt, MarylandRemoteAP110 Principal Software Systems Engineer / Full-Stack Architect Program: NASA GSFC Astrophysics Science Division: Guest Observer Facility (GOF) Modernization Project Location: Remote Position, US-based only (occasional travel to NASA Goddard Space Flight Center, Greenbelt, MD will be required for badging and review milestones) Employment Type: Full-time contractor position Level: Senior / Principal (~10+ years of relevant experience) Eligibility: Must be a US Citizen or Lawful Permanent Resident (LPR); having resided in the US for the past 3 consecutive years and able to meet the access requirements for a system handling Controlled Unclassified Information (CUI) and Personally Identifiable Information (PII). Defining Success: By the end of 2026, you deliver a credible, demonstrable prototype that unifies key parts of the proposal–review–grant workflow for an initial set of missions, earns buy-in from participating mission stakeholders, and establishes the architecture, security posture, and team practices needed to iterate quickly toward a production system.
Principal Cyber Systems Engineer Systems Planning and AnalysisPrincipal Cyber Systems EngineerWashington, D.C., Washington, DCFull timeComprising more than 130 personnel, the Integrated Warfare Systems Group (IWSG) delivers expertise across program and project management, acquisition and contracting, systems and digital engineering, software development, test and evaluation, sustainment and life‑cycle management, cybersecurity, international/Foreign Military Sales, strategic communications, and IT services. These capabilities support more than 100 Above Water Sensor, Undersea, and Combat System programs and projects within the Navy’s Portfolio Acquisition Executive for Mission Systems, Maritime and Munitions, as well as clients at Naval Surface Warfare Center, Dahlgren Division, Naval Surface Warfare Center, Crane Division, and the Office of Naval Research.#FC #DICE #DD #MC #CT.
Principal Spacecraft Guidance, Navigation & Control Engineer Quantum SpacePrincipal Spacecraft Guidance, Navigation & Control EngineerRockville, MD$175,000–$225,000 / yearWe are seeking a Principal Spacecraft Guidance, Navigation & Control Engineer to serve as the technical authority for the GNC subsystem across multiple spacecraft programs, leading architecture, design, procurement, integration, and verification. To comply with U.S. Government space technology export regulations, including ITAR, applicants must be a U.S. citizen, lawful permanent resident, protected individual under 8 U.S.C. §1324b(a)(3), or otherwise eligible to obtain the required authorizations from the U.S. Department of State.
Principal, AI Engineer Venture Global LNGPrincipal, AI EngineerArlington, VirginiaUsing reliable, proven technology in an innovative plant design configuration, Venture Global’s modular, mid-scale plant design will replace traditional designs as it allows for the same efficiency and operational reliability at significantly lower capital cost. This role partners closely with the Director of AI Engineering on strategy, with Data Engineering on ontology and semantic modeling, and with senior stakeholders to ensure architectural decisions are sound, scalable, and secure.
Principal Model-Based Systems Engineer STRPrincipal Model-Based Systems EngineerArlington, VA$206,000–$284,000 / yearThe ideal candidate will be well-versed in Systems Engineering techniques, Modeling and Simulation, Digital Engineering/MBSE and be excited about opportunities to mentor more junior staff and help foster growth of subject matter expertise across the organization. In addition to modeling in SysML, the Systems Engineer will be responsible for implementing and guiding teams in the customization and automation techniques offered by Cameo to enable multi-disciplinary programs to comply with DoD Digital Engineering goals.
Staff Engineer, Advanced Thermal Modeling Baltimore Aircoil Company, Inc.Staff Engineer, Advanced Thermal ModelingJessup, MD$98,400–$168,900 / yearPart timeThe Global Advanced Digital Engineering team is Baltimore Aircoil Company’s (BAC) engine, combining domain SME, software, and automation expertise to build modular, scalable, and reusable engineering capability, including models, methods, tools, CAD and simulation environments, workflows, and digital architectures that improve speed, quality, and consistency of engineering outcomes across BAC’s products, applications, and digital ecosystems. The Staff Engineer, Advanced Thermal Modeling reports to the Principal Engineer, Advanced Thermal Modeling, and operates across BAC’s product portfolio, applications space, and global regions, requiring close coordination with NPI, CPI, Advanced Applications, and Global and Regional business teams, balancing deep technical contribution with cross-functional impact.
Special Projects Group Principal Geotechnical Engineer - Transportation ECS LtdSpecial Projects Group Principal Geotechnical Engineer - TransportationHanover, Maryland$125,000–$200,000 / yearECS is currently ranked #60 in Engineering News-Record’s Top 500 Design Firms (April 2026), #148 in Engineering News-Record’s Top 200 Environmental Firms (October 2025) and #50 in Zweig Group’s Hot Firm List (May 2025). Primary responsibilities include pursuit and execution of geotechnical projects in the transportation sector in the northern Mid-Atlantic region , including highway, bridge, and rai l .
Principal Firmware Reverse Engineer (AI-Assisted) Bigbear.aiPrincipal Firmware Reverse Engineer (AI-Assisted)Columbia, MarylandFull timeOverview: BigBear.ai is seeking a Principal Firmware Reverse Engineer focused on advancing reverse engineering capabilities through AI-assisted tooling and automation. What you will do: Design and implement tooling enhancements to support reverse engineering workflows for firmware, embedded systems, and application software.
Principal Software Engineer Intelliforce-IT Solutions GroupPrincipal Software EngineerAnnapolis Junction, MDFull timeYou will lead the technical vision for a new capability, define what done looks like, and work closely with an Integrated Feature Team to carry the work across the full lifecycle. This is a strong fit for an engineer who likes solving hard problems, influencing system direction, and building software that has to perform in real operational environments.
Principal Senior Vulnerability Research Engineer (Onsite) Nightwing Intelligence SolutionsPrincipal Senior Vulnerability Research Engineer (Onsite)Annapolis Junction, Maryland$122,000–$253,000 / yearFor over four decades, our team has been providing some of the world’s most technically advanced full-spectrum cyber, data operations, systems integration and intelligence support services to the U.S. government on its most important missions. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization.
Principal Radio Frequency Engineer Research InnovationsPrincipal Radio Frequency EngineerAberdeen Proving Ground, MDYou will support and sustain deployed operational systems, ensuring performance, reliability, and mission effectiveness in real-world conditions, while contributing to systems that discover, analyze, and exploit signals across full-spectrum operations—delivering precise, actionable intelligence when it matters most. The above salary range represents a general guideline; however, the Company considers several factors when determining base salary offers, such as the scope and responsibilities of the position and the candidate's experience, education, skills, and current market conditions.
Principal Specialist Sales Engineer, Data Security - Majors, East Zscaler IncPrincipal Specialist Sales Engineer, Data Security - Majors, EastWashington, DC$175,875–$251,250 / yearZscaler is committed to providing reasonable support (called accommodations or adjustments) in our recruiting processes for candidates who are differently abled, have long term conditions, mental health conditions or sincerely held religious beliefs, or who are neurodivergent or require pregnancy-related support. The range displayed on each job posting reflects the minimum and maximum target for new hire salaries for the position across all US locations and could be higher or lower based on a multitude of factors, including job-related skills, experience, and relevant education or training.
Principal Specialist Sales Engineer, Zero Trust Branch - Majors, East Zscaler IncPrincipal Specialist Sales Engineer, Zero Trust Branch - Majors, EastWashington, DCRemote$175,875–$251,250 / yearThe Speciality Sales team is a global group of professionals who are passionate about delighting our customers, nurturing trusted partnerships, and sharing their expertise to drive a secure, cloud-enabled digital future and further cement our position as the world leader in cloud security. Sales, Customer Success, Sales Enablement, Solution Architects, Business Development, Transformation, and Technology Partnerships all work together to demonstrate the power and agility of Zscaler cloud transformation to the world, and we are looking for your expertise to elevate our Exposure Management team.
Principal Software Engineer Xometry IncPrincipal Software EngineerNorth Bethesda, MD$200,000–$225,000 / yearXometry's digital marketplace gives manufacturers the critical resources they need to grow their business while also making it easy for buyers at Fortune 1000 companies to tap into global manufacturing capacity. Operational Excellence: You will own the reliability and security of the integration microservices, ensuring that "click-to-buy" functionality is bulletproof and that monitoring/alerting covers the unique lifecycle of enterprise PLM transactions.
Principal Commercial Data Engineer MGM Resorts InternationalPrincipal Commercial Data EngineerMD$126,200–$168,300 / yearYou will partner closely with senior leadership, architects, data science, analytics, IT, and business stakeholders to design resilient, scalable, and trusted data systems that support real-time decisioning, advanced analytics, and AI/ML applications. THE DAY-TO-DAY: Define the multi-year architectural vision for MGM's Lakehouse platform, including compute, storage, orchestration, semantic layers, governance, and reliability.
Systems Engineer 6 - Principal Systems Lifecycle Engineering Navius TechnologiesSystems Engineer 6 - Principal Systems Lifecycle EngineeringAnnapolis Junction, MarylandSystems Engineer 6 Location: Annapolis Junction, MD Clearance Required: TS/SCI with polygraph Position Type: Full-Time About Navius Technologies: Navius Technologies is a mission-driven technology startup founded by experts with deep roots in the intelligence community, cybersecurity, and commercial tech. As a senior member of the engineering team, you will take a lead role in guiding technical design, managing process development, and mentoring other engineers while interacting with stakeholders and senior government officials.
NewPrincipal Software Engineer LeidosPrincipal Software EngineerLaurel, MarylandAt this level, you will serve as a technical lead across multiple software-development teams, coordinate closely with customers and systems engineering, evaluate new technologies and processes, and help ensure developed and modified software meets demanding functional, performance, interface, and operational requirements. The Leidos Intel Sector combines technology-enabled services and mission software capabilities in the areas of cyber, logistics, security operations, and decision analytics to support Intelligence Community customers as they address evolving national security challenges.
NewCivil Engineer - Project Level Morris & Ritchie AssociatesCivil Engineer - Project LevelLaurel, MarylandJoin Morris & Ritchie Associates, Inc. (MRA) as a Project Engineer in our growing Laurel, Maryland office, where you'll play a key role in designing and delivering a diverse range of private land development and water resources projects throughout Prince George's, Anne Arundel, Montgomery, and Howard Counties. If you're a more senior engineer, you'll also have the opportunity to lead multiple projects, manage budgets and schedules, coordinate County reviews, and build strong relationships with clients and MRA Principals while ensuring high-quality project delivery.
Staff Engineer, Structural Baltimore Aircoil Company, Inc.Staff Engineer, StructuralJessup, MD$90,000–$154,100 / yearPart timeTravel as needed to global engineering centers in Europe and Asia, and occasionally as needed to regional manufacturing facilities, test laboratories, technical conferences, and professional association meetings, etc. . The Staff Engineer, Structural Systems, is charged with leading the structural engineering execution of major product development programs and supporting the structural integrity of product platforms.