11 prototype engineer jobs at 7 companies in Modesto, CA

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Principal Mechanical Design Engineer
Livermore, California, United States
$111k-$145k/yr OnsiteFull Time
FormFactor
FormFactorNASDAQ: FORM: Manufacturer of semiconductor test and measurement equipment.
5+ YOEMechanical design engineer with minimum 5 years' related experience (or equivalent degree/experience), strong 3D CAD skills, GD&T and tolerance knowledge, hands-on prototyping, metrology, and cross-functional troubleshooting.
Autodesk AutoCAD, SolidWorks, SolidWorks PDM
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Senior Mechanical Engineer - Active Clearance Required
Livermore, California, United States
$176k-$267k/yr HybridFull Time
Lawrence Livermore National Laboratory
Lawrence Livermore National Laboratory: Develops science and technology for United States national security.
Bachelor's degree in mechanical engineering or equivalent, advanced mechanical design and prototype experience, project leadership and mentoring, strong communication and problem-solving, active DOE Q or Top Secret clearance required.
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Principal Hardware Engineer - Fluidics - Pleasanton, CA
Pleasanton or United States
$250k-$270k/yr OnsiteFull Time
Calyxo
Calyxo: Develops vacuum-assisted devices for minimally invasive kidney stone removal
15+ YOEBachelor's in engineering required, 15+ years developing fluidic/mechatronic/control systems for regulated products, expertise in fluid dynamics, closed-loop control, prototyping, embedded software (C/C++, Python), medical device standards (IEC 60601, ISO 13485).
C, C++, Python
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Sr. Engineer, R&D - Pleasanton, CA
Pleasanton, California, United States
$120k-$135k/yr OnsiteFull Time
Getinge
GetingeNasdaq Stockholm: GETI B: Manufactures medical equipment for acute care and life sciences.
5+ YOEMaster's preferred (Bachelor's required) in Mechanical/Biomedical Engineering or related, 5+ years experience, medical device R&D experience preferred, prototyping (CNC, 3D printing), Solidworks, knowledge of FDA and ISO 13485.
CNC, 3D printing, Solidworks
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Cleared Composite Design and Test Engineer - Weapon Subsystems, Onsite
Livermore or Albuquerque or Kansas City
$122k-$238k/yr OnsiteFull Time
Sandia National Laboratories
Sandia National Laboratories: Federal research and development laboratory for national security.
Bachelor's degree or equivalent in a relevant engineering discipline, active DOE Q clearance (Sigma 14/15) required, experience or coursework with composite materials, CAD/FEA tools, manufacturing processes, prototype testing, and ability to work onsite in California.
CAD, FEA, Creo, Fibersim, SolidWorks, CATIA, ANSYS, Abaqus
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Cleared Senior/Principal Composite Design and Test Engineer - Weapon Subsystems, Onsite
Livermore, California, United States
$140k-$281k/yr OnsiteFull Time
Sandia National Laboratories
Sandia National Laboratories: Federal research and development laboratory for national security.
5+ YOEBachelor's in a relevant field + 5 years' relevant experience (or equiv.); active DOE Q clearance required; experience in composite materials, structural analysis, CAD/FEA, prototyping, testing, and technical leadership.
Creo, Fibersim, SolidWorks, CATIA, ANSYS, Abaqus
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Cleared Composite Design and Test Engineer - Weapon Subsystems, Onsite
Livermore, California, United States
$122k-$238k/yr OnsiteFull Time
Sandia National Laboratories
Sandia National Laboratories: Conducts science and engineering research for national security.
Bachelor's degree or equivalent experience, active DOE Q clearance (or ability to obtain), experience with composite materials, CAD and FEA tools, prototype fabrication/testing, and strong communication skills.
Creo, Fibersim, SolidWorks, CATIA, ANSYS, Abaqus
2mo
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Mechanical Systems Technician Associate V
Pleasanton, California, United States
$39-$53/hr OnsiteFull Time
Bio-Rad Laboratories
Bio-Rad LaboratoriesNYSE: BIO: Develops and manufactures products for life science research and diagnostics.
10+ YOEAssociate or equivalent engineering experience; 10+ years of professional experience; strong prototyping, machining, electrical, and troubleshooting skills; experience with regulated environments preferred.
CAD, Measurement equipment, Soldering, Electrical test equipment
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Cleared Senior/Principal Composite Design and Test Engineer - Weapon Subsystems, Onsite
Livermore or Albuquerque or Kansas City
$140k-$281k/yr OnsiteFull Time
Sandia National Laboratories
Sandia National Laboratories: Conducts science and engineering research for national security.
5+ YOEBachelor's degree plus 5 years relevant experience (or equivalent), active DOE Q clearance (or equivalent), expertise in composite design, testing, CAD/FEA, prototyping, data analysis, technical leadership, and ability to obtain/maintain clearance (U.S. citizenship).
Creo, Fibersim, SolidWorks, CATIA, ANSYS, Abaqus
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Sr. Research and Development Technician - Pleasanton, CA
Pleasanton, California, United States
$41-$46/hr OnsiteFull Time
Calyxo
Calyxo: Develops vacuum-assisted devices for minimally invasive kidney stone removal
5+ YOEAssociate degree or technical certification in biomedical or mechanical engineering; 5+ years in medical device or regulated field; hands-on prototyping; CAD and basic shop tools; on-site in Pleasanton, CA; vaccination compliance.
Solidworks, CAD, 3D printing, GDP, Soldering, Machining tools
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R&D Packaging Scientist 1 (Recent Grad Starting in 2026)
Pleasanton, California, United States
HybridFull Time
Clorox
CloroxNew York Stock Exchange: CLX: Manufactures and markets consumer cleaning and wellness products.
Recent graduate (Dec 2025–Aug 2026) with a 3.0+ GPA in packaging, materials, or mechanical engineering; knowledge of ASTM testing; experience with ArtiosCAD and TOPS; able to work in a lab and prototype samples.
ArtiosCAD, TOPS