Principal Geospatial Software Engineer (TS/SCI with Polygraph required) Red AlphaPrincipal Geospatial Software Engineer (TS/SCI with Polygraph required)Columbia, 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. We are seeking a skilled and motivated Principal Geospatial Software Engineer to join our team in developing cutting-edge geospatial analysis, ETL (Extract, Transform, Load), and visualization microservices to support mission-focused systems.
Principal Network Engineer LeidosPrincipal Network EngineerColumbia, Maryland$139,100–$251,450 / yearMasters Degree in a related technical discipline and 15 or more years related experience or Bachelors Degree in a related technical discipline and seventeen (17) years of experience providing network engineering support. The engineer translates mission and business requirements into secure, high-performing network solutions and collaborates with operations personnel, program management, and engineering teams to ensure reliable network performance in DoD/IC environments.
Principal Test Engineer LeidosPrincipal Test EngineerBethesda, Maryland$131,300–$237,350 / yearCollaborate with team members (Scrum Master, Product Owner, Software Developers) to develop test approaches with emphasis on automation of recurring/regression test cases through selected toolsets. Our 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.
Principal 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.
Principal 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.
Principal 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.
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 #50 in Zweig Group’s Hot Firm List (May 2025). 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 Identity Solutions Engineer TS/SCI Polygraph LeidosPrincipal Identity Solutions Engineer TS/SCI PolygraphHanover, MarylandJob Summary: The Secure Token Service (STS) Team Lead is responsible for leading the design, implementation, and sustainment of enterprise Identity, Credential, and Access Management (ICAM) solutions focused on Secure Token Services (STS) and Single Sign-On (SSO) capabilities. The ideal candidate possesses deep technical expertise in federation technologies, PKI, authentication protocols, cloud environments, and enterprise security architectures while serving as the technical lead for planning, implementation, and customer engagement.
Building Enclosure Associate Principal ECS LtdBuilding Enclosure Associate PrincipalHanover, Maryland$105,000–$150,000 / 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). You will work closely with clients and multidisciplinary project teams to evaluate building envelope performance, support construction quality, and deliver practical consulting solutions across a variety of facility types.
Principal AI Software Engineer (SWE-4) LeidosPrincipal AI Software Engineer (SWE-4)MarylandTechnical Proficiency : Proficient in current AI/ML technologies such as classification, clustering, collaborative filtering, search, and retrieval using techniques such as but not limited to deep neural networks (DNN), recurrent neural networks (RNN), attention-based transformers, etc. The candidate will work across multiple technical domains including software engineering, data science, machine learning, and large language model (LLM) integration to deliver innovative capabilities from proof-of-concept through operational deployment.
Principal Java Developer - FS Poly stanleyreidPrincipal Java Developer - FS PolyAnnapolis Junction, MarylandApply online at https://careers.stanleyreid.com/ or contact our MD team for more info: mwhitford@stanleyreid.com, asmith@stanleyreid.com. You will be responsible for developing, maintaining, and enhancing complex software systems, with a focus on cutting-edge projects involving advanced sensor technology.
Principal Engineer Mechanical & Acoustic Baltimore Aircoil CompanyPrincipal Engineer Mechanical & AcousticJessup, MDFull timePOSITION PURPOSE The Principle Mechanical & Acoustic Engineer is part of the Subject Matter Expert (SME) Engineering team and supports BAC's New Product Engineering (NPE) organization by applying mechanical engineering expertise in sound, vibration, airflow, fan systems, pump systems, and overall system performance to develop and optimize new products. The role requires frequent cross-functional interaction with NPE, Thermal Engineering, Structural Engineering, Controls Engineering, Global Components, R&D Lab, Manufacturing, Supply Chain, vendors, and regional engineering teams.
Sr./Principal Scientist, Analytical Development & QC Workforce GeneticsSr./Principal Scientist, Analytical Development & QCBaltimore, MarylandThe role generates and executes protocols and validation documents, drafts procedures and QC work instructions, defines sampling and test plans, and ensures day-to-day QC lab activities are organized, compliant, and aligned with GMP and ISO 13485 expectations. Establish and maintain LifeSprout’s analytical assay strategy, including selection of fit-for-purpose methods, justification of assay suitability, definition of acceptance criteria, and alignment of development, qualification, validation, and transfer activities with current industry expectations.
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.
Structural Associate Principal ECS LtdStructural Associate PrincipalHanover, Maryland$105,000–$150,000 / 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). You will collaborate with clients and multidisciplinary project teams to evaluate structural performance, support construction and repair efforts, and deliver practical, high-quality engineering solutions across a variety of facility types.
Principal Electrical Engineer, NA Vantage Data CentersPrincipal Electrical Engineer, NAMarylandDeveloping and operating across North America, EMEA and Asia Pacific, Vantage has evolved data center design in innovative ways to deliver dramatic gains in reliability, efficiency and sustainability in flexible environments that can scale as quickly as the market demands. Highly skilled in project engineering and design work, the Principal Electrical Engineer handles complex and high-impact assignments, providing technical expertise to guide project success.
Principal Software Engineer TS/SCI Polygraph LeidosPrincipal Software Engineer TS/SCI PolygraphHanover, 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. May 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.
Principal Information Systems Security Engineer LeidosPrincipal Information Systems Security EngineerLinthicum, MarylandAs a Principal Information Security Systems Engineer (ISSE) you will join a small team of security engineers providing Information Assurance (IA) Architecture Analysis and Security Engineering Support for the implementation and fielding of the National Leadership Command Capability in support of Nuclear Command, Control, and Communications (NC3), Continuity of Government (COG), and Senior Leader communications. Bachelor of Science degree from an accredited university ideally in Computer Science, Information Assurance, Information Security System Engineering or related field with a minimum of 20 years of experience as an Information Systems Security Engineer (ISSE) or System Engineer on programs and/or contracts with the customer space.
Principal Hardware Design Engineer LeidosPrincipal Hardware Design EngineerLaurel, MarylandAs part of a multidisciplinary engineering team, you will serve as a senior technical authority, guiding complex engineering efforts, advancing innovative design methodologies, and helping shape the future direction of hardware engineering capabilities supporting national security missions. As a Principal Hardware Design Engineer, you will provide expert technical guidance across complex engineering efforts while developing innovative hardware solutions, advancing reverse engineering methodologies, and mentoring engineering teams.
NewPrincipal Java Developer - Partial Telework - FS Poly stanleyreidPrincipal Java Developer - Partial Telework - FS PolyAnnapolis Junction, MarylandFounded by engineers, they've been tackling complex missions for over 15 years while prioritizing "good technology" — solutions that excel in user experience, long-term value, and ethical considerations. Turn your aspirations into reality and experience the difference a great employer can make – it's not just talk with our client, it's excellence in practice.