Safety Engineer Clark Construction GroupSafety EngineerMcLean, Virginia$45,000–$120,000 / yearAdditional benefits include life insurance, commuter benefit, short & long term disability, fitness reimbursement, FSA, tuition reimbursement, back-up daycare, tutoring & family support benefits, EAP/Work-Life assistance, and a holiday contribution program. Success in this role requires significant commitment, including flexibility to work extended hours, especially during critical project phases or client deadlines.
Network Engineer Anakim ConsultingNetwork EngineerGreenbelt, MarylandIdentifying, troubleshooting, and resolving technical problems related to network failure/integrity and usage of PC hardware and software including conference room displays, controllers, Crestron devices, AMX, Cisco, and other conferencing devices. Extracting and compiling a variety of engineering data from field notes, manuals, lab reports, etc., processing data, identifying errors or inconsistencies, selecting methods of data presentation.
Instructional Systems Design Engineer, Expert IbilityInstructional Systems Design Engineer, ExpertWashington DCThis role leads the systematic assessment and development of training solutions for formal delivery, manages teams of instructional designers, and ensures that curriculum and training products align with organizational strategy, learning science best practices, and government program objectives. • Experience developing and delivering multi-modal training solutions including instructor-led training (ILT), eLearning, virtual instructor-led training (vILT), and blended learning.
Staff Engineer, HMS Factory (R5276) Shield AI IncStaff Engineer, HMS Factory (R5276)DC$150,000–$220,000 / yearJob Description: As a Software Engineer on the HMS Factory Team, you will develop, implement, and maintain the automated testing frameworks, log analysis tools, and scenario-generation scripts built on top of the Hivemind Platform (HMP) SDK. Required qualifications: Typically requires a Bachelor's degree in Computer Science, Computer Engineering, Aerospace Engineering, Systems Engineering, or related technical discipline, or equivalent practical experience.
Principal Engineer, Software (R5285) Shield AI IncPrincipal Engineer, Software (R5285)Washington, DC$220,000–$330,000 / yearHivemind consists of four products: EdgeOS (C++ based high-performance middleware for autonomy development), Pilot (autonomy for the edge built atop EdgeOS; a models-based, modular and open architecture C++ codebase), Forge (Shield AI's AI Factory for the design, development, and testing of Hivemind Edge systems; a service-oriented architecture leveraged through an SDK, CLI, and web portal; a Go, Python, Typescript codebase), Commander (Software and hardware to support rich human-in-the-loop and human-on-the-loop interactions with the Hivemind; a C++-based back-end for interaction with Pilot; and a web-application UI for mission planning, command and control by operators implemented in a Typescript/React codebase). Work closely with the technical leads of Hivemind Commander (mission planning, command and control, air-ground communications) and Hivemind Design (configurations, test and evaluation, rehearsal, analysis) to enhance the user experience of their products.
Senior Space Based Sensing Integration Engineer Axient LLCSenior Space Based Sensing Integration EngineerChantilly, VAAstrion is seeking a Senior level engineer to provide SETA (Systems Engineering & Technical Assistance) support to a government program office responsible for the SBST PAE (Space-Based Sensing and Targeting Portfolio Acquisition Executive). You will provide independent technical assessment, systems engineering expertise, and mission-focused insight across the full lifecycle from design through launch and early operations.
Senior Application Engineer, Sheet Metal XometrySenior Application Engineer, Sheet MetalNorth Bethesda, MD$86,000–$111,000 / yearThe position will require competencies that include CAD proficiency, knowledge of sheet metal design and fabrication methods, experience communicating sheet metal design for manufacturability feedback, costing, and sound technical communication aptitude. Xometry’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.
Cybersecurity Engineer PUNCH Cyber Analytics GroupCybersecurity EngineerReston, VARemoteThis role requires strong technical knowledge of perimeter security technologies, firewall rule analysis, security control implementation, and the ability to translate technical findings into clear documentation, reports, SOPs, training materials, and architecture diagrams. We are seeking an experienced Cybersecurity Engineer to provide network security, firewall analysis, and security engineering support for the Department of the Interior (DOI) and its approximately 80,000 end users.
Systems Engineer - Hypersonic Missile Program R&P Technologies, LLCSystems Engineer - Hypersonic Missile ProgramWashington, DC, Washington, DCFull timeThis role will support hypersonic missile flight systems and requires comprehensive professional knowledge of engineering principles, systems engineering processes, and technical program management to execute and achieve the cost, schedule, and performance objectives for the development and delivery of critical weapon system capabilities. Understanding of the following topics is highly preferred: Electrical and Mechanical Design, Navigation, Guidance, and Control, Telemetry and Instrumentation, Flight Software, Re-entry Hardware, and Flight Termination Systems, Requirement Definition, Allocation, and Verification, Mechanical, Electrical, and Software Interfaces.
Development Engineer VB Spine LLCDevelopment EngineerLeesburg, VA$85,000–$95,000 / yearAs a Development Engineer in our R&D function within the Spine division, you'll perform implant and instrumentation design work while actively participating on multi-functional teams to support sustaining projects for commercially available products - including product evolution, regulatory documentation updates, and supply chain continuity. At VB Spine, join a high-performing R&D team where you'll gain valuable hands-on experience supporting the evolution and sustainment of innovative spinal implants and instruments that improve patient lives.
Forward Deployed Engineer, Operations & Sustainment (R5497) Shield AI IncForward Deployed Engineer, Operations & Sustainment (R5497)Washington, DC$150,000–$230,000 / yearThe role requires strong technical judgment, clear customer communication, comfort operating under field pressure, and the discipline to turn field lessons into durable support artifacts: runbooks, supported baselines, evidence packages, known-issue records, escalation paths, customer-safe updates, and product feedback. 5+ years of experience in field engineering, forward-deployed engineering, applications engineering, systems integration, flight test, robotics support, unmanned systems operations, technical operations, customer deployment, or a similar hands-on technical role.
Project Engineer VB Spine LLCProject EngineerLeesburg, VA$90,000–$110,000 / yearAs a Project Engineer in our R&D function within the Spine division, you'll perform implant and instrument design work, lead small projects, and actively participate on multi-functional teams to advance sustaining projects for commercially available products - including product evolution, regulatory documentation updates, and supply chain continuity. We're the largest privately held spine company and among the largest family-owned medical technology companies in the world, dedicated to innovation, surgeon partnerships, and improving patient outcomes in spine care.
Software Engineer Actalent IncSoftware EngineerColumbia, MD$38.46–$62.50 / hourEngineers benefit from a smaller company atmosphere where they can take on meaningful responsibilities, engage deeply with complex technical challenges, and participate in customer-facing activities, including occasional travel to customer sites for testing and integration. The environment emphasizes agile development practices, peer reviews, and close collaboration within a small engineering team, providing high visibility into programs and a clear line of sight between your work and its impact on mission-critical defense systems.
Senior Software Engineer, Autonomy Capabilities - Space Shield AI IncSenior Software Engineer, Autonomy Capabilities - SpaceWashington, DC$160,000–$240,000 / yearThis team operates at all levels of the command-and-control hierarchy (from advanced control laws, through motion planning, and up to advanced tactical behaviors and multi-agent coordination) and across a multitude of mission sets, platform types, and operational domains (e.g., air, sea, space). The Autonomy Capabilities Team develops functionality to automate single- and multi-agent teams of platforms in pursuit of mission objectives and acts as a central discipline-aligned focal-point for encouraging consistent usage of technical approaches across business portfolios.
Staff Registered Structural Engineer - Advanced Power Generation Black & Veatch Holding CoStaff Registered Structural Engineer - Advanced Power GenerationGaithersburg, MDCommunicates client interests and drivers to project team members and develops approaches to accommodate these concerns in the performance of the work on low to moderately complex projects. All applicants must be able to complete pre-employment onboarding requirements (if selected) which may include any/all of the following: criminal/civil background check, drug screen, and motor vehicle records search, in compliance with any applicable laws and regulations.
Human Factor Engineer IbilityHuman Factor EngineerWashington DCWorking with clinical, technical, training, and operational stakeholders, the Human Factors Engineer evaluates how users interact with technology, identifies workflow and usability challenges, and recommends solutions that improve user enablement, training and onboarding, peer support, and overall system performance. Assist with long-term staffing analysis by evaluating user roles, workflow demands, and workforce trends to help identify opportunities for improved staffing models, role optimization, and sustainable operational support.
Staff Software Engineer, Autonomy Capabilities - Space Shield AI IncStaff Software Engineer, Autonomy Capabilities - SpaceWashington, DC$187,531–$281,297 / yearAs a Staff engineer, you will lead the technical delivery of complex autonomy capabilities and demonstrate the ability to operate in significantly more grey space than more junior engineers, helping customers shape their requirements, define technical approaches for the team, and drive technical execution throughout the development process. This team operates at all levels of the command-and-control hierarchy (from advanced control laws, through motion planning, and up to advanced tactical behaviors and multi-agent coordination) and across a multitude of mission sets, platform types, and operational domains (e.g., air, sea, space).
Mission Engineer & Integrator Peraton IncMission Engineer & IntegratorMcLean, VA$135,000–$216,000 / yearYou will act as the primary liaison between customers, stakeholders, technical development teams, and end users to ensure operational requirements are clearly defined, technical solutions meet mission objectives, and capabilities are successfully deployed and sustained. Provide administrative support including meeting coordination, recording meeting minutes, tracking action items, documenting technical discussions, and maintaining project status.
Senior Staff Engineer, Test Director (R5445) Shield AI IncSenior Staff Engineer, Test Director (R5445)Washington, DC$170,000–$250,000 / yearJob Description: As a Staff Flight Test Engineer / Test Director, you will serve as the end-to-end Test Director for the integration, verification, and flight test of Hivemind Mission Autonomy on small Unmanned Aircraft Systems (UAS). In this role, you are the single technical authority for test execution-responsible for determining test readiness, directing test conduct, managing risk, and ensuring data-driven decisions throughout development and flight test operations.
Technical Support Engineer Core BTS, Inc.Technical Support EngineerAshburn, VA$30–$35 / hourNRI North America is looking for a qualified IT Technical Support Engineer that will be responsible for providing onsite support for new hire onboarding, desktop deployment, and IT operations support activities. This role focuses on hands-on device preparation, imaging, asset management, shipping logistics, and onsite technical support to ensure a seamless onboarding experience.
FEDSIM Slide Engineer (SE) Peraton IncFEDSIM Slide Engineer (SE)Herndon, VA$104,000–$166,000 / yearAs a Slide Engineer, you will collaborate with technical experts, graphics designers, volume leads, proposal managers, and other stakeholders to produce clear, compelling presentations. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies.
Software Engineer III Iridium Communications IncSoftware Engineer IIIReston, VA$100,000–$130,000 / yearAs a Software Engineer III, you'll independently deliver high-quality work and drive projects and deliverables to completion, including the development, enhancement, and maintenance of software solutions that support ground system operations. What We're Looking For: If you enjoy learning about and working with breakthrough technologies, and are enthusiastic about working in the space industry, then you will be excited about the Software Engineer III opening with Iridium for a Space Development Agency (SDA) project.
Systems Engineer- Nexthink Federal National Mortgage AssociationSystems Engineer- NexthinkReston, VA$96,000–$124,000 / yearAs a Systems Engineer - Nexthink, you will help improve the digital experience of thousands of employees by leveraging endpoint intelligence, automation, and analytics to proactively identify and resolve technology challenges across the enterprise. In this role, you will use the Nexthink platform to transform endpoint telemetry and employee feedback into actionable insights that improve device performance, enhance productivity, strengthen operational efficiency, and elevate the overall employee technology experience.
Staff Engineer, HMS DevOps/DevEx (R5447) Shield AI IncStaff Engineer, HMS DevOps/DevEx (R5447)Washington, DC$150,000–$220,000 / yearYou will configure and optimize C++, Python, and Node.js compilation pipelines, scale auto-running GitLab runner fleets, manage secure Artifactory container registries, deploy Forge in Azure Gov Cloud, and write custom HMS extensions to our pi-gov GenAI routing harness. Build, test, and deploy automated tooling integrations, webhook dispatchers, and state-change scripts connecting GitLab, Jira, and Confluence to orchestrate release workflows.
PS Sales Engineer HP IncPS Sales EngineerVA$71,100–$85,770 / yearSupports more experienced pre-sales consultants or sales teams in sales presentations by preparing materials, contributing technical insights, and explaining technical features of the offerings to potential clients. Focuses on building a solid understanding of specific products or areas within the organization by studying product features, benefits, use cases, and competitive advantages.
DFM Project Engineer XometryDFM Project EngineerNorth Bethesda, MD$65,000–$85,000 / yearAdditionally, you will take on special projects related to expanding the capabilities of our manufacturing partner network, working with OEM equipment makers, and our internal team of experts to improve our core competencies. Xometry'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.
Senior Application Security Engineer SGA Inc.Senior Application Security EngineerRockville, MDThis role involves in evaluating security vulnerabilities, security tools, implementing security solutions, and leveraging latest solutions to secure code review capabilities. The main function of senior application security engineer is to plan, coordinate and implement application security practices in each phase of software development life cycle though testing, remediation support, tool evaluation, etc.
NewSystem Engineer SME Quadrant IncSystem Engineer SMEChantilly, VASenior and Subject Matter Expert Engineers to provide SETA (Systems Engineering & Technical Assistance) support to a government program office responsible for the development and deployment of a space-based Air Moving Target Indicator (AMTI) system. Support Model-Based Systems Engineering (MBSE) and digital engineering efforts, including system performance modeling and multi-sensor integration.
NewSenior System Engineer Quadrant IncSenior System EngineerChantilly, VASenior and Subject Matter Expert Engineers to provide SETA (Systems Engineering & Technical Assistance) support to a government program office responsible for the development and deployment of a space-based Air Moving Target Indicator (AMTI) system. Support Model-Based Systems Engineering (MBSE) and digital engineering efforts, including system performance modeling and multi-sensor integration.
Senior Cyber Security Engineer ManTechSenior Cyber Security EngineerChantilly, VAIn this role, you will support mission-critical cybersecurity operations by designing, deploying, and maintaining secure, resilient data collection and monitoring solutions that enable informed decision-making across the enterprise. + Occasionally moves about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers via email, phone, or virtual communication, which may involve delivering presentations.
Manufacturing Engineer OTT Hydromet CorpManufacturing EngineerSterling, VirginiaAn associate’s position within the salary range will be based on several factors, including, but not limited to, relevant education, qualifications, certifications, experience, skills, seniority, geographic location, performance, shift, travel requirements, sales or revenue-based metrics, any collective bargaining agreements, and business or organizational needs. Ott HydroMet is part of the Water Quality segment of Veralto (NYSE: VLTO), a $5.5B global leader focused on ensuring access to clean water, safe food and medicine, and trusted essential goods.
Mechanical Harness Engineer AST Space MobileMechanical Harness EngineerLanham, MDWe are seeking a highly skilled and detail-oriented Mechanical Harness Engineer to join our dynamic team working on state-of-the-art Low Earth Orbit (LEO) satellite systems. Our engineers and space scientists are on a mission to eliminate the connectivity gaps faced by today's five billion mobile subscribers and finally bring broadband to the billions who remain unconnected.
Linu DevOps Engineer - REMOTE Dunhill Professional Search of Wilmington, Inc.Linu DevOps Engineer - REMOTEAlexandria, VARemote$130,000–$160,000 / yearFull timePreferred Qualifications• Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related field, or equivalent relevant experience.• Strong hands-on experience with Linux administration, including patching with DNF and YUM, logging, auditing, performance tuning, and issue resolution.• Skills Required• 3+ years of experience implementing, administering, and troubleshooting Linux in an enterprise environment including Linux patching with DNF and YUM.• Strong experience building and supporting CI/CD pipelines using tools.
Project Engineer (Foundations) Clark Construction GroupProject Engineer (Foundations)McLean, VirginiaBachelor's degree required in Civil Engineering with concentration on Geotechnical and Structural Engineering, Masters Degree in Geotechnical or Structural Engineering is a plus. Collaborate with project owners, general contractors and other design professionals during the development phase of projects.
NewOn Call Critical Minerals Expert ICFOn Call Critical Minerals ExpertWashington, District of ColumbiaIn this role, you will help advance priorities aligned with U.S. Department of Energy (DOE) Office of Critical Minerals and Energy Innovation (CMEI) direction—including efforts to accelerate mining activities, diversify critical mineral and metals supply chains, stimulate innovation in processing and metallurgy, expand battery and magnet research, and facilitate recycling (including black mass and other battery materials). Pay Range - There are multiple factors that are considered in determining final pay for a position, including, but not limited to, relevant work experience, skills, certifications and competencies that align to the specified role, geographic location, education and certifications as well as contract provisions regarding labor categories that are specific to the position.
Electrical Project Manager - Hyperscale Data Centers White Space Align Communications IncElectrical Project Manager - Hyperscale Data Centers White SpaceSterling, VAYou will be onsite daily, leading subcontractors, managing schedules, ensuring quality control, and owning the successful delivery of electrical power distribution systems from upstream critical equipment to IT loads. Experience with the electrical design and performing the following tasks: creating power system failure scenarios, creating load bank plans (level 4, and level 5 Cx), performing required electrical calculations, and creating failover matrix would be a plus.
Electrical Project Manager – Hyperscale Data Centers (White Space) Align CommunicationsElectrical Project Manager – Hyperscale Data Centers (White Space)Sterling, VA$140,000–$170,000 / yearYou will be onsite daily, leading subcontractors, managing schedules, ensuring quality control, and owning the successful delivery of electrical power distribution systems from upstream critical equipment to IT loads. Experience with the electrical design and performing the following tasks: creating power system failure scenarios, creating load bank plans (level 4, and level 5 Cx), performing required electrical calculations, and creating failover matrix would be a plus.
Electrical Project Manager - Hyperscale Data Centers (White Space) Align CommunicationsElectrical Project Manager - Hyperscale Data Centers (White Space)Sterling, VA$140,000–$170,000 / yearYou will be onsite daily, leading subcontractors, managing schedules, ensuring quality control, and owning the successful delivery of electrical power distribution systems from upstream critical equipment to IT loads. Experience with the electrical design and performing the following tasks: creating power system failure scenarios, creating load bank plans (level 4, and level 5 Cx), performing required electrical calculations, and creating failover matrix would be a plus.
QA Specialist Actalent IncQA SpecialistRockville, MD$35–$40 / hourThe QA Specialist leads quality planning, root cause investigations, corrective and preventive actions, nonconformance management, process improvement initiatives, and quality system compliance activities, playing a critical role in maintaining product integrity, supporting operational excellence, and driving continuous improvement throughout the product lifecycle. The QA Specialist (Quality Engineer / Quality Specialist) ensures the quality, reliability, and compliance of manufactured products within a Government Systems portfolio, including Unmanned Aerial Vehicles (UAVs), Unmanned Surface Vehicles (USVs), aerospace test equipment, and advanced defense systems.
RMA Coordinator I Industrial Electric ManufacturingRMA Coordinator IAshburn, VirginiaThe RMA Coordinator I works closely with Field Service personnel to obtain missing documentation when required and ensures non-conforming material documentation is prepared and distributed in accordance with the IEM Quality Management System. The purpose of the RMA Coordinator I role is to manage the processing of returned materials from Field Service locations and ensure proper documentation, tracking, and disposition of returned parts in accordance with company procedures.
Interdisciplinary Project Manager U.S. Department of the InteriorInterdisciplinary Project ManagerWashington, DC$89,508–$116,362 / yearRelated Curriculum: Degree in architectural engineering may be accepted as satisfying in full the basic requirements, provided the completed course work in architectural engineering provided knowledge, skills, and abilities substantially equivalent to those provided in the courses specified in paragraph A. The curriculum for a degree in either architecture or architectural engineering covers function, esthetics, site, structure, economics, mechanical-electrical, and other engineering problems related to the design and construction of buildings primarily (but not exclusively) intended to house human activities. Project Scoping, Data, and Asset Management: Identifies need and develops justification for project, collects data, identifies project scope, conducts cost estimating and project entry into systems, databases, and other project management tools for prioritization, funding requests, and status updates, and acquires funding for project planning, supplemental services, support functions, and implementation, and remediation.
CNC Machinist Ukpeagvik Inupiat CorpCNC MachinistIndian Head, MDThis individual must be able to interpret engineering drawings-including Geometric Dimensioning and Tolerancing (GD&T)-use basic metrology equipment, and work closely with engineers and fellow machinists to support rapid development and iteration. The ideal candidate will have 7-10 years of hands-on experience operating CNC machines and water jets in a collaborative, fast-paced prototype shop environment.
Project Engineer - Instrumenation Sixense Inc.Project Engineer - InstrumenationSilver Spring, MDFull timeThe job specific Project Engineer will be responsible for supporting the successful execution of Instrumentation & Geotechnical monitoring projects by combining field operations, project coordination, and client support in the Pittsburgh, PA area. Project Engineer is responsible for supporting the successful execution of Instrumentation & Geotechnical monitoring projects by combining field operations, project coordination, and client support.
NewQuantum Engineer SME DCS CorporationQuantum Engineer SMESpringfield, VAPerform trade studies and conduct analyses to evaluate proposed quantum machine learning approaches, review technical reports, assess product-quality impacts, and characterize performance using quantum simulation or related technologies to support verification and quality assurance. The DCS Air and Space Technology Sector are seeking a qualified candidate to apply subject matter expertise in the areas of quantum engineering, analysis, and system design of complex programming projects supporting National Agencies.
NewSALES ENGINEER Carter Machinery Company, IncSALES ENGINEERManassas, VA$0.75–$1.25 / hourExperience dealing with multiple disciplines, such as contractors, consultants, engineers and end-users; work as a liaison with other members of the sales team and technical support to solve client problems. The Sales Engineer is responsible for the sale of new Caterpillar generator sets with ancillary equipment such as weatherproof enclosures, fuel tanks, and automatic transfer switches.
Materials Engineer KBR IncMaterials EngineerChantilly, VAPosition Summary: KBR National Security Solutions is seeking a motivated and talented Senior Materials Engineer to join our team in Chantilly, Virginia and to support a major U.S. Government organization responsible for the acquisition, integration, and operation of proliferated satellite constellations. This role would augment existing systems engineering capabilities by providing deeper insight into material selection, optical performance considerations, and environmental survivability for space systems.
Materials Engineer Delphinus EngineeringMaterials EngineerWest Bethesda, MarylandThis role involves direct support to government engineers for material condition assessments, resolution of Departure from Specification (DFS) issues, and engineering review of shipyard commitments, not inspection or quality control functions. Join Delphinus Engineering and you’ll have the opportunity to begin a rewarding career working on a wide variety of important and challenging projects that make a real impact.
Electronics Parts, Materials, and Processes Engineer - Advanced Packaging The Aerospace CorpElectronics Parts, Materials, and Processes Engineer - Advanced PackagingChantilly, VA$117,300–$175,900 / yearAs the operator of a federally funded research and development center (FFRDC), we are broadly engaged across all aspects of space- delivering innovative solutions that span satellite, launch, ground, and cyber systems for defense, civil and commercial customers. The Parts, Materials & Processes Department (PMPD) includes subject matter experts across a broad range of areas pertaining to electrical, electronic, and electromechanical (EEE) parts procurement, qualification, application, root cause failure analysis, as well as materials and processes.
Senior Electronic and Optical Materials Device Fabrication Engineer Johns Hopkins University Applied Physics Laboratory LLCSenior Electronic and Optical Materials Device Fabrication EngineerLaurel, MDBuild and maintain version-controlled GDS/layout databases with Python-based automation for parametric layout generation, fracturing, and design rule checking, and develop data-analysis pipelines linking design, fabrication, and metrology data for CD, overlay, and yield trends. The role is predominantly fabrication-focused, with a majority of working hours spent in a cleanroom or laboratory environment, including the cleanroom at JHU-APL in Laurel, MD and other multi-user facilities within a 20 min to 1 hr drive.
Associate Electronic and Optical Materials Device Fabrication Engineer Johns Hopkins University Applied Physics Laboratory LLCAssociate Electronic and Optical Materials Device Fabrication EngineerLaurel, MDMaintain version-controlled GDS/layout databases with Python-based automation for parametric layout generation, fracturing, and design rule checking, and develop data-analysis pipelines linking design, fabrication, and metrology data for CD, overlay, and yield trends. The role is predominantly fabrication-focused, with a vast majority of working hours spent in a cleanroom or laboratory environment, including the cleanroom at JHU-APL in Laurel, MD and other multi-user facilities within a 20 min to 1 hr drive.