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108 prototyping engineer jobs at 70 companies in Frederick, MD

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Sr. Prototyping Architect, AGS Security Engineering
Boston or Miami or Arlington or Atlanta or New York or Herndon
$154k-$229k/yr OnsiteFull Time
Amazon
AmazonNASDAQ: AMZN: Global online retail and cloud computing technology provider.
8+ YOE8+ years in technology domains, 5+ years design/implementation/consulting, 3+ years programming (C++, C#, Java, Python, Golang, PowerShell, Ruby), 3+ years in threat modeling/secure coding/identity/cryptography/system or network security; Bachelor's or equivalent required.
Amazon Bedrock, CI/CD, C++, C#, Containers, Golang, Infrastructure as Code, Java, PowerShell, Python, RAG, Ruby, Serverless
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2mo
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Mechanical Engineer (Entry Full-Time & Intern Positions)
Baltimore, Maryland, United States
$72k-$87k/yr OnsiteFull Time, Internship
Key Tech
Key Tech: An engineering focused on high-tech medical devices and turnkey design and development.
0+ YOEEntry-level and internship opportunities; hands-on mechanical design, rapid prototyping, and testing of assemblies.
SolidWorks, Finite Element Analysis, Rapid Prototyping
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Principal Engineer
Beltsville, Maryland, United States
$140k-$190k/yr OnsiteFull Time
Ion Storage Systems
Ion Storage Systems: Develops and manufactures high-performance solid-state ceramic battery technology.
10+ YOE10+ years engineering experience, B.S. (required) in mechanical/electrical/mechatronics, strong hands-on hardware and automation experience, 3D CAD skills, prototype line and equipment build experience, ability to lead root-cause investigations and mentor engineers.
3D CAD
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Senior Infrastructure Engineer
College Park, Maryland, United States
$135k-$216k/yr OnsiteFull Time
Peraton
Peraton: National security and mission-critical government technology services provider.
12+ YOEPoly cleared senior engineer with 12+ years in systems engineering or application prototyping; strong customer-facing and leadership capabilities; relevant certifications.
INCOSE, CISSP, CCNA, RHCE, MCSE, VCP, ITIL, PMP, Agile
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Project Engineer, Electrical
Towson, Maryland, United States
$90k-$145k/yr HybridFull Time
Stanley Black & Decker
Stanley Black & DeckerNYSE: SWK: Manufacturer of power tools, hand tools, and outdoor equipment.
5+ YOEBachelor’s in Engineering; 5+ years electronics engineering; analog hardware design; power electronics; DFMEA; troubleshooting; prototype development; manufacturing readiness.
Analog electronics, Power electronics, DFMEA, Circuit prototyping, Engineering documentation
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Lead Design Engineer
Austin or Cody or Washington
OnsiteFull Time
Fathom5
Fathom5: Develops security-focused industrial technology and software for defense.
5+ YOEB.S. in engineering, 5+ years engineering experience, hands-on CAD and prototype assembly experience, gearbox design capability, strong written and oral communication, ability to perform shop work and occasional travel.
CAD
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Mechanical Design Engineer
Columbia, Maryland, United States
$93k-$120k/yr OnsiteFull Time
TCOM
TCOM: Designs and manufactures persistent surveillance aerostat and ISR systems.
5+ YOEBachelor's degree in Engineering, minimum 5 years engineering experience (advanced degree may substitute), experience with simulation and prototyping, ability to produce engineering drawings and documentation, and support design reviews and testing.
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2026 Graduate – Hypersonic and Reentry System Development and Prototyping
Laurel, Maryland, United States
$85k-$165k/yr OnsiteFull Time
Johns Hopkins University Applied Physics Laboratory
Johns Hopkins University Applied Physics Laboratory: Conducts research and engineering for national security and space.
0+ YOEBachelor’s or Master’s in aerospace/mechanical engineering or physics; ability to obtain Secret clearance and eventually Top Secret; U.S. citizenship; strong teamwork and motivation.
Cart3D, CFD++, US3D, Creo, SolidWorks, Abaqus, COMSOL, Simulink, C/C++, 3DoF simulations, 6DoF simulations, Finite element analysis
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Principal Innovation Engineer
Reston, Virginia, United States
$177k-$332k/yr OnsiteFull Time
Parsons
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
10+ YOE10+ years in systems/software/platform engineering with experience prototyping emerging technologies, cloud/edge deployments, biometrics/peripherals, networking, resilience, and presenting technical recommendations.
AWS, Terraform, Java, MongoDB, Elasticsearch/OpenSearch, RabbitMQ, Kafka, Grafana, ELK, HashiCorp Consul, Nomad, Vault
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2mo
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Senior Infrastructure Engineer
College Park, Maryland, United States
$135k-$216k/yr OnsiteFull Time
Peraton
Peraton: Provides advanced technology and mission support for government agencies.
12+ YOESenior-level infrastructure engineer with 12+ years in system engineering/prototype development; active TS/SCI w/ Polygraph; multiple technical certs; on-site near College Park, MD.
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Junior Electrical Engineer
Dulles, Virginia, United States
$61k-$122k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
0+ YOEBS in electrical/computer engineering, ability to obtain TS/SCI, 0-3 years relevant experience, understanding of analog/digital circuits, schematic reading, prototyping, lab test equipment familiarity.
Altium Designer, OrCAD, Eagle, Python, MATLAB, oscilloscope, multimeter, signal generator, CAD
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3w
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Senior Mechanical Engineer
Sterling, Virginia, United States
HybridFull Time
Axon
AxonNASDAQ: AXON: Develops weapons and software for law enforcement and safety.
Bachelor's degree in mechanical engineering (or related), proven mechanical design and system integration experience, CAD proficiency, prototyping and fabrication skills, thermal/structural analysis experience, knowledge of embedded systems and MIL STDs, strong communication.
SolidWorks, AutoCAD, Fusion 360, ESP32, Arduino, Raspberry Pi, FEA, 3D printers, drills, bandsaws
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Advanced Mechanical Engineer
Herndon, Virginia, United States
$137k-$144k/yr OnsiteFull Time
General Dynamics Mission Systems
General Dynamics Mission SystemsNYSE: GD: Designs and manufactures defense and mission-critical technology solutions.
5+ YOEBachelor's in Mechanical Engineering (plus 5 years) or Master's (plus 3 years); Department of Defense Secret clearance at hire; U.S. citizenship; experience in structural analysis, machine design, prototyping, and familiarity with standards and CAD/analysis tools.
Ansys, Plaxis, Inventor, Revit
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3w
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Principal AI/ML Engineer - Sales Engineer- Remote
Eden Prairie or Minneapolis or Washington or United States
$165k-$282k/yr RemoteFull Time
UnitedHealth Group
UnitedHealth GroupNYSE: UNH: Provides health insurance and technology-enabled health care services.
Hands-on AI/ML/GenAI engineering with strategic solutioning; experience with Python, LLMs, RAG, AI agents; customer-facing workshop and executive presentation experience; healthcare domain knowledge; rapid prototyping skills.
Python, LLMs, RAG, AI agents, Cursor, GitHub Copilot, Claude Code
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Mechanical Design Engineer
Washington, District of Columbia, United States
$112k-$190k/yr OnsiteFull Time
Technology Service Corporation
Technology Service Corporation: Develops advanced sensor systems and engineering solutions for defense.
5+ YOEBachelors in engineering or equivalent, 5+ years mechanical design/product development experience, SolidWorks and prototyping/testing experience, active DoD Secret (ability to obtain TS/SCI), able to lift 50 lbs.
SolidWorks, CNC
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Forward Deployed Engineer (Federal)
Washington or New York City
$175k-$235k/yr FieldFull Time
Cape
Cape: A privacy-first mobile carrier providing secure cellular network services.
2+ YOE2+ years engineering or FDE experience; U.S. citizenship and eligibility for Top Secret clearance; ability to scope ambiguous problems, embed with customers, prototype integrations, and support live operations.
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Radar Payload Systems Engineer
Chantilly, Virginia, United States
OnsiteFull Time
KBR
KBRNYSE: KBR: Provides engineering, technology, and professional services for global markets.
8+ YOESenior radar hardware engineer with TS/SCI clearance, 8+ years radar space system experience, remote sensing knowledge, MATLAB/Python prototyping.
MATLAB, Python, MS Office
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3mo
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Hardware Integration Engineer (Electrical)
Dulles, Virginia, United States
$87k-$182k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
5+ YOEAbility to obtain TS/SCI, BS in EE/CE/CS (ABET), 5+ years RF engineering experience, strong RF theory and system design skills, prototyping and test experience, strong communication and attention to detail.
Altium Designer, HFSS, CST, ADS
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3mo
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Multidisciplinary Systems Engineer (Mechanical/Software)
Frederick, Maryland, United States
$75k-$101k/yr HybridFull Time
WGS Systems
WGS Systems: Develops intelligence and surveillance systems for military and law enforcement.
2+ YOEBachelor's in Mechanical Engineering, Mechatronics, Robotics, Aerospace Engineering, or related field; 2-5 years product development experience in defense/aerospace/electronics; US Citizen with ability to obtain USG security clearance; strong CAD/FEA; Python; prototyping; hardware/software integration.
SolidWorks, CREO, ANSYS, COMSOL, SolidWorks Simulation, MATLAB, Python, C/C++, Linux, Git
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2w
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Mechanical Engineer - Multiple Levels (Engineer Mechanical) - 29175
Alexandria, Virginia, United States
$96k-$193k/yr OnsiteFull Time
HII
HIINYSE: HII: Builds naval ships and provides global defense technology solutions.
2+ YOEActive US Secret clearance required, mechanical CAD and prototyping experience, design for manufacturing knowledge, hands-on assembly and documentation skills; level-dependent experience from ~2 to 9 years.
Mechanical CAD tools, Microsoft PowerPoint, Microsoft Visio, Adobe, Jetson, Arduino, RPi, Python, C++, CFD, FEA, signal analyzers, SDR, PCBAs, Electronic assembly
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