NewPrincipal Elasticsearch Systems Engineer LeidosPrincipal Elasticsearch Systems EngineerBethesda, MarylandOur talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. January 20, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
NewPrincipal Technical Project Manager (TPM) LeidosPrincipal Technical Project Manager (TPM)Bethesda, MarylandSuccessfully execute project plans, remain sensitive to customer needs, resolve issues, escalate when appropriate and capture and validate requirements, developing and managing project governance plans, project schedules, team goals, defining success criteria and project milestones, and budgets while identifying and mitigating limitations to execution. The TPM supports the Agile Release Train Program Manager (ART PM) and Technical Lead (TL) in developing Epics, Features and application roadmaps for the design and development of new and existing applications.
NewPrincipal Engineer, Structural Systems, Global Baltimore Aircoil Company, Inc.Principal Engineer, Structural Systems, GlobalJessup, MDFull timeThe Principal Engineer is expected to operate independently, initiate technical projects, develop innovative solutions where existing methods are inadequate, and translate advanced structural engineering knowledge into safe, reliable, manufacturable, cost-effective, and competitive BAC products. The position has broad technical responsibility for structural systems including cold-formed steel components, structural steel, connections, panels, frames, supports, lifting and handling systems, and overall product structural behavior.
NewPrincipal Java Developer LeidosPrincipal Java DeveloperBethesda, MarylandDocument and perform systems software development, including deployment of build artifacts across different environments leveraging GitFlow constructs and using industry leading DevOps tools like GitHub, Jenkins, and scripting (e.g., python, bash). Support the Agile software development lifecycle following Program SAFe practices while coordinating closely with team members, Product Owners and Scrum Masters to ensure User Story alignment and implementation to customer use cases.
Principal Engineer, Advanced Thermal Modeling Baltimore Aircoil CompanyPrincipal Engineer, Advanced Thermal ModelingJessup, MDFull timePOSITION PURPOSE The 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 role spans unit-level physics, system-level performance, and cost-of-ownership modeling, with accountability for modeling strategy, architecture, and delivery through direct contribution and team execution, and translates thermodynamic and heat transfer expertise into scalable modeling frameworks, simulation tools, and validated methods.
NewPrincipal Software Engineer LeidosPrincipal Software EngineerBethesda, Maryland$131,300–$237,350 / yearSupport the Agile software development lifecycle following SAFe practices, using industry leading DevOps tools like GitHub, Jenkins, Unix bash scripting and leveraging tools such as JIRA and Confluence to track activities. Based in a DevOps framework, this role participates in and/or directs major deliverables of projects through all aspects of the software development lifecycle including scope and work estimation, architecture and design, coding and unit testing.
Principal Data Scientist, Operations Mission LanePrincipal Data Scientist, OperationsMclean, VA$173,000–$203,000 / yearShares best practices for software engineering and can help experienced data scientists work through complex technical problems, especially operationalizing and evaluating models for real-world use. In partnership with our sponsor banks, we offer credit cards under the Mission Lane brand name, with better, clearer terms, and a more refined customer experience than the alternatives available to people working hard to improve their credit.
NewPrincipal ETL Developer LeidosPrincipal ETL DeveloperBethesda, MarylandCollaboration and communication: Collaborate effectively with data architects, data engineers, application/service developers, and other stakeholders to translate business requirements into robust technical solutions and effectively communicate complex technical concepts to both technical and non-technical audiences. The candidate will be responsible for defining architectural best practices, optimizing performance in large-scale environments, and mentoring junior developers, ensuring the delivery of robust, scalable, and secure data flow solutions that drive critical customer needs.
NewConsultant, Senior Principal American Bureau of Shipping (ABS)Consultant, Senior PrincipalWashington, District of ColumbiaRemoteThis includes providing technical expertise to the project manager and project team members with initiating, planning, executing, monitoring, and controlling and closing projects. The Senior Principal Consultant serves as senior technical expert on project tasks to ensure quality services are delivered on schedule and within available budget to meet customer requirements.
Principal Cyber Systems Engineer, SME (TS/SCI Required) Praescient Analytics LLCPrincipal Cyber Systems Engineer, SME (TS/SCI Required)Arlington, VAPraescient Analytics is a Certified Woman-Owned Small Business (WOSB) with over a decade of expertise in advanced analytics, engineering, and DevOps, specializing in transforming complex data into actionable intelligence for informed decision-making. About Praescient Analytics: Praescient Analytics is a leader in delivering advanced analytic, data engineering, and technology integration solutions in support of the Department of Defense (DoD), Intelligence Community, and federal law enforcement.
Principal Product Manager, HTS API Marketplace Hopper IncPrincipal Product Manager, HTS API MarketplaceWashington D.C., DCRemoteWhat would your day-to-day look like: Define what the HTS API Marketplace is: how capabilities are structured, packaged, and priced across a portfolio spanning HTS Connect, Search Polygons, Autocomplete, Ranking, Content & Property Mapping, Room Mapping, Deduplication/Auction, Pricing, Extranet, Taxes, and Custom Deals Engine. Set the sequencing and prioritization across all capabilities - from in-progress work (HTS Connect, Taxes) through scoping-stage products (Content & Property Mapping, Room Mapping, Deduplication/Auction, Pricing) to capabilities not yet started (Search Polygons, Autocomplete, Ranking, Extranet, Custom Deals Engine).
Principal, Go-to-Market StrategyNEW The Vertex Co IncPrincipal, Go-to-Market StrategyNEWWashington, DCWorking closely with the Chief Commercial Officer, senior leadership, and practice leaders, this individual will play a key role in building the frameworks, insights, and messaging needed to support scalable, repeatable growth. The Vertex Companies, LLC (VERTEX) is a global $150M professional services firm that offers integrated forensic consulting, expert witness services, construction project advisory, and compliance and regulatory consulting to a myriad of markets and industries.
Principal Software Engineer Recorded Future IncPrincipal Software EngineerWashington, DC$152,000–$228,500 / yearAs a Principal Software Engineer, you will work across application code and infrastructure to collect, transform, and deliver structured threat data: tracking malware infrastructure, phishing campaigns, spam networks, command-and-control systems, and more. What You'll Do: Data Pipeline Ownership: Design, build, and maintain scalable data pipelines that collect, transform, and deliver structured threat intelligence data powering the Security Intelligence Graph.
Engineer Principal - Algorithm Development BAE Systems PlcEngineer Principal - Algorithm DevelopmentChantilly, VAfor description visit the url https://jobs.baesystems.com/global/en/job/BAE1US124685BREXTERNAL/Engineer-Principal---Algorithm-Development .
Principal Software Engineer BigBear.aiPrincipal Software EngineerColumbia, MDEngineer will work closely with mission stakeholders to analyze software requirements, design innovative technical solutions, develop software applications, and implement high-performance capabilities supporting advanced mission objectives. BigBear.ai is a leading provider of AI-powered decision intelligence solutions for national security, supply chain management, and digital identity.
Principal AI Cybersecurity Advisor Optiv Security IncPrincipal AI Cybersecurity AdvisorHerndon, VARemoteBy combining advanced business and security practitioner knowledge, the Principal AI Cybersecurity Advisor designs security solutions using some of the most advanced security services and technologies to achieve highly defensible and scalable security programs to align with the clients' security initiatives wherever AI is involved. Effectively work with multiple client personas across the executive branch (CxO), as well as other relevant personas to develop AI product and services, advisement, and AI security strategy and define roadmaps to execute on AI strategy-aligned business goals, budgetary spend, and metrics based on return of investment.
Principal Vulnerability Analyst Dragos IncPrincipal Vulnerability AnalystDCRemoteWorking alongside another vulnerability analyst, you''ll serve as a recognized subject matter expert and trusted internal resource-mentoring researchers and penetration testers, driving methodology development, and helping identify gaps in the Dragos Platform''s ability to detect new exploits. About the Role: Dragos'' Vulnerability Analysis team identifies novel security gaps in the industrial control systems that power plants, water utilities, and manufacturing facilities depend on-and translates those findings into detections and actionable intelligence that defend critical infrastructure.
Regional Geotechnical Principal ECS LtdRegional Geotechnical PrincipalHanover, Maryland$125,000–$175,000 / 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 #38 in Zweig Group’s Hot Firm List (June 2026). What You'll Do: The Geotechnical Principal serves as the highest level of technical leadership within the geotechnical practice, responsible for ensuring overall quality, performance, and strategic direction of projects and services.
Principal Systems Administrator (TS/SCI with Polygraph required) Red AlphaPrincipal Systems Administrator (TS/SCI with Polygraph required)Annapolis Junction, Maryland$155,000–$225,000 / yearOur total compensation package was strategically designed with our members in mind with the intention to: reward our members for their hard work and commitment to our customers' missions; allow members to share in Red Alpha's success as we continue to grow and expand our footprint; provide long-term career opportunities through stability and internal mobility; and provide the resources our members need to support themselves and their dependents in the form of a robust benefits package. Our approach in determining final salaries takes into consideration a number of factors such as education, certifications, total years of relevant professional experience, actual level of expertise, and the responsibilities of the role itself.
Principal Software Engineer (TS/SCI with Polygraph required) Red AlphaPrincipal Software Engineer (TS/SCI with Polygraph required)Annapolis Junction, Maryland$190,000–$235,000 / yearOur total compensation package was strategically designed with our members in mind with the intention to: reward our members for their hard work and commitment to our customers' missions; allow members to share in Red Alpha's success as we continue to grow and expand our footprint; provide long-term career opportunities through stability and internal mobility; and provide the resources our members need to support themselves and their dependents in the form of a robust benefits package. Our approach in determining final salaries takes into consideration a number of factors such as education, certifications, total years of relevant professional experience, actual level of expertise, and the responsibilities of the role itself.