Senior Information System Security Engineer (ISSE) LeidosSenior Information System Security Engineer (ISSE)Alexandria, VirginiaThis role is pivotal in ensuring the confidentiality, integrity, and availability of cloud-hosted assets while enabling secure innovation at scale by working closely with cloud engineers, cybersecurity analysts, and program leadership to drive continuous improvement and deliver value to the mission. The Digital Sector at Leidos is seeking a dynamic Information Systems Security Engineer (ISSE) to support cloud modernization initiatives for the United States Coast Guard (USCG) at Command, Control, Communication, Computer, Cyber, and Intelligence Service Center (C5ISC) in the Alexandria, VA area.
Mechanical Engineer Booz Allen HamiltonMechanical EngineerMclean, VirginiaAssist the client's contracting officer (CO) and contracting officer's technical representative (COTR) with acquisition planning, execution, and administration, assist the CO and COTR with conducting pre-bid and pre-construction site visits with the COTR, provide invoice supporting information to the COTR for payment, and prepare and monitor project schedules. Provide mechanical engineering review, coordination, and oversight for operations, maintenance, repair, and construction work and oversee and coordinate activities with trade shops, including prioritizing work, reviewing ongoing projects, inspecting installed equipment, and overseeing and coordinating work orders, service orders, and projects.
Model Based Systems Engineer (Navy) - Mid Level Systems Planning and AnalysisModel Based Systems Engineer (Navy) - Mid LevelAlexandria, VirginiaFull timeEmploy DoN-approved modeling tools and MBSE environments, including the Naval Integrated Modeling Environment (Naval IME) and Cameo Systems Model, Cameo Enterprise Architecture, and Teamwork Cloud and conduct simulation and other analysis (including but not limited to trade-off analysis). SPA provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work.
Senior Engineer, Water SidaraSenior Engineer, WaterWashingtonAssist in providing Program Management Services including CIP planning, budgeting, scheduling, project bundling and prioritization, managing project delivery, overseeing and coordinating multiple consultants and contractors to execute the work, overseeing data management, providing technical advisory services and staff augmentation for large water and wastewater programs. Manage sewer engineering design and consulting teams for complex assignments, including hydraulic and hydrologic calculations, utility plans, technical specifications, preliminary and final designs, bid assistance, design services during construction (DSDC), infrastructure condition assessment and rehabilitation and cost estimating for bypass pump systems, pipelines, and stormwater systems.
Systems Engineer (Expert-Level) SHINE SystemsSystems Engineer (Expert-Level)Washington, DCBachelor’s degree or higher in Systems Engineering or a related technical or scientific field such as Engineering, Physics, Mathematics, Operations Research, Engineering Management, Computer Science, Information Technology, Management Information Systems, or a related STEM degree program; or equivalent additional experience. 18+ years of experience working in government or industry in relevant areas including DoD/IC Acquisition Process, Requirements Process, PPBES Process, or systems engineering of large, complex System of Systems or Service Oriented Architecture environments in cloud, on-premise, or hybrid infrastructures.
Junior ICS/SCADA & Critical Infrastructure Engineer - TS/SCI Poly LeidosJunior ICS/SCADA & Critical Infrastructure Engineer - TS/SCI PolyReston, VirginiaAugust 13, 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. Bachelor's degree in a STEM discipline (Electrical Engineering, Mechanical Engineering, Systems Engineering, or related field) and relevant professional experience.
Structural Engineer - TS/SCI Poly Required LeidosStructural Engineer - TS/SCI Poly RequiredReston, VirginiaAs a key member of a multidisciplinary team, you will combine structural engineering knowledge, intelligence analysis, geospatial data, and innovative problem-solving techniques to evaluate facilities, infrastructure, and protective systems worldwide. The ideal candidate is a technically strong engineer who thrives in ambiguity, enjoys solving complex problems with incomplete information, and possesses exceptional attention to detail, analytical rigor, and intellectual curiosity.
Electrical Engineer Booz Allen Hamilton Inc.Electrical EngineerWarrenton, VA$61,900–$141,000 / yearOnsite: If this position is listed as onsite, work will primarily be performed at a Booz Allen office or customer facility, where employees will collaborate directly with colleagues and customers as required by the role. Salary at Booz Allen is determined by various factors, including but not limited to location, the individual's particular combination of education, knowledge, skills, competencies, and experience, as well as contract-specific affordability and organizational requirements.
ICS/SCADA & Critical Infrastructure Engineer - TS/SCI Polygraph Required LeidosICS/SCADA & Critical Infrastructure Engineer - TS/SCI Polygraph RequiredReston, VirginiaThe primary focus of this group is understanding commercial and heavy industrial facilities, as well as the interoperability of systems managed by industrial control systems (ICS) and building management systems (BMS). Bachelor's degree in STEM field (e.g., electrical engineering, mechanical engineering, or related discipline) and 4+ years of relevant experience, or a Master's degree and 2+ years of relevant experience.
Senior Mechanical Engineer - TS/SCI Polygraph Required LeidosSenior Mechanical Engineer - TS/SCI Polygraph RequiredReston, VirginiaMEP Systems Expertise: Strong multidisciplinary understanding of Mechanical, Electrical, and Plumbing (MEP) system design, integration, and operational functionality within complex industrial or military facilities, including specialized containment systems, filtration systems, and backup power infrastructure. The successful candidate will leverage strong engineering expertise to analyze facility designs, spatial layouts, operational workflows, and supporting infrastructure to determine functional capabilities and mission relevance.
Lead Mechanical Engineer - TS/SCI Polygraph Required LeidosLead Mechanical Engineer - TS/SCI Polygraph RequiredReston, VirginiaMEP Systems Expertise: Strong multidisciplinary understanding of Mechanical, Electrical, and Plumbing (MEP) system design, integration, and operational functionality within complex industrial or military facilities, including specialized containment systems, filtration systems, and backup power infrastructure. Five or more years of field experience working with industrial HVAC systems, including air-cooled and water-cooled chillers, condensers, cooling towers, air handlers, heat exchangers, boilers, and related equipment.
Senior Controls Engineer AES CorporationSenior Controls EngineerArlington, VA$113,000–$141,525 / yearDevelop control strategies for active power control (APC), reactive power control (RPC), frequency response, voltage regulation, ramp rate limiting, and state-of-charge (SOC) management for hybrid solar and storage facilities, ensuring performance under expected grid operating conditions. The position partners closely with internal teams, OEMs, EPCs, and operations stakeholders to define control strategies, evaluate designs, and support successful project execution from design through commercial operation.
Senior Transit Facility Design Engineer Whitman, Requardt and Associates, LLPSenior Transit Facility Design EngineerWashington, District of Columbia$100,000–$180,000 / yearFull timeDemonstrated leadership in leading large-scale projects as well as project development ranging from planning, alternatives analysis, environmental process, permitting, final design, construction, safety certification and commissioning facilities. We are looking for a detail-oriented person to review client operations and recommend vehicle maintenance equipment and equipment layouts to maximize operational processes for bus and rail operations.
Transportation - Water Resources Engineer - Mid Level Whitman, Requardt and Associates, LLPTransportation - Water Resources Engineer - Mid LevelFairfax, Virginia$140,000–$215,000 / yearFull timeVarious Hydraulic Engineering Circulars (HEC's) for scour, stream and bank stability, roadway stability and stream scour/stability countermeasure design including but not limited to HEC-18, HEC-20 and HEC-23. The specific compensation offered to a candidate may vary based on factors including, but not limited to, the candidate's relevant knowledge, training, skills, work location, and/or experience.
Plumbing Engineer - Mid-Level Whitman, Requardt and Associates, LLPPlumbing Engineer - Mid-LevelFairfax, Virginia$140,000–$215,000 / yearFull timeDesign and Layout: Develop plumbing system designs including domestic water, sanitary, storm drainage, and specialty systems (medical gas, compressed air, etc.). The specific compensation offered to a candidate may vary based on factors including, but not limited to, the candidate's relevant knowledge, training, skills, work location, and/or experience.
Water/Wastewater Process Mechanical Engineer Whitman, Requardt and Associates, LLPWater/Wastewater Process Mechanical EngineerFairfax, Virginia$90,000–$185,000 / yearFull timeThe Water/Wastewater Process Mechanical Engineer will be responsible for the evaluation, planning, design, and construction administration of municipal water and wastewater treatment facilities & processes, distribution and collection systems, chemical storage & feed systems, and process mechanical, piping and pumping systems. The specific compensation offered to a candidate may vary based on factors including, but not limited to, the candidate's relevant knowledge, training, skills, work location, and/or experience.
Transportation - Water Resources Engineer Whitman, Requardt and Associates, LLPTransportation - Water Resources EngineerFairfax, Virginia$90,000–$185,000 / yearFull timeExperience designing drainage, stormwater management systems/BMP's, erosion and sediment pollution controls; and preparing contract documents preferred. The specific compensation offered to a candidate may vary based on factors including, but not limited to, the candidate's relevant knowledge, training, skills, work location, and/or experience.
Geotechnical Engineer - Mid-Level Whitman, Requardt and Associates, LLPGeotechnical Engineer - Mid-LevelFairfax, Virginia$140,000–$215,000 / yearFull timeThe specific compensation offered to a candidate may vary based on factors including, but not limited to, the candidate's relevant knowledge, training, skills, work location, and/or experience. Requirements: Bachelor's degree specializing in Geotechnical Engineering, Master's degree specializing preferred.
Principal Electrical Engineer, NA Vantage Data CentersPrincipal Electrical Engineer, NAAshburn, VA$185,000–$195,000 / yearDeveloping 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. Coordinate heavily with internal engineering teams across all disciplines to ensure products delivered to Operations are streamlined and optimized to meet the needs of the business across all functions.
VDI Engineer, Expert BAE Systems PlcVDI Engineer, ExpertHerndon, VA$149,603–$254,317 / yearAbout BAE Systems Intelligence & Security BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. BAE Systems, a top-ten prime contractor to the U.S. Department of Defense, enables the U.S. government to transform data into intelligence and provides engineering, integration and sustainment support for critical military platforms and systems.