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23 materials and processes engineer jobs at 9 companies in Downey, CA

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Materials and Process Engineer
Torrance, California, United States
$105k-$160k/yr OnsiteFull Time
Robinson Helicopter Company
Robinson Helicopter Company: Private American manufacturer of civil helicopters and unmanned aircraft serving training, utility, public-safety, and defense operators.
Hands-on materials and process engineering for material selection, testing, failure investigation, process improvement, and compliance with 14 CFR Part 27.
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Materials & Processes Technical Specialist II
Long Beach, California, United States
$38-$58/hr OnsiteFull Time
Relativity Space
Relativity Space: Aerospace developing 3D-printed rockets and launch services.
5+ YOEAssociate's degree in materials or natural science,5+ years hands-on aerospace high-temperature materials processing and testing, CNC and composite fabrication experience, ability to operate tooling and testing instruments,mentoring skills.
Prototrack, DXF, STF, SPACECLAIM, AutoCAD, NX, Team Center, Warp Drive, Microsoft Office, Microsoft Excel, DSC, LFA, TGA, Dilatometer, Instron
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Staff Materials and Process Engineer
Los Angeles, California, United States
OnsiteFull Time
Karman Industries
Karman Industries: A thermal-technology building modular heat-processing systems for AI data centers and industry.
5+ YOEB.S. in materials/mechanical engineering, 5+ years in materials selection/qualification/process development, experience with brazing/welding and test campaigns, hands-on manufacturing process development.
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Materials and Process Engineer 3/4
Woodland Hills, California, United States
$104k-$194k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Global aerospace and defense technology.
5+ YOEExperience in metallurgy, materials testing, and manufacturing processes; active US Secret clearance; 5+ years engineering experience with STEM bachelor's; hands-on lab and supplier support experience.
SEM, NDT, NDI
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Senior Materials and Process Engineer, Rocket Motor Systems
Costa Mesa, California, United States
$146k-$194k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology developing AI-powered autonomous military systems.
5+ YOEBSc in materials/engineering field, 5+ years materials/process experience in aerospace/propulsion/defense, experience creating material and process specifications, materials characterization, root-cause analysis, and ability to obtain Top Secret clearance.
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Materials and Process Engineer 3/4
Woodland Hills, California, United States
$104k-$194k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Global aerospace and defense technology.
5+ YOEActive US Secret clearance, STEM bachelor's (materials science preferred), 5+ years engineering experience (Principal) or 8+ years (Sr Principal), metallurgy and manufacturing process knowledge, lab/ metallography experience.
SEM
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Materials and Process Engineer (Mid/ Senior)
El Segundo, California, United States
$105k-$167k/yr OnsiteFull Time
Hybron
Hybron: American aerospace and defense composites manufacturer producing lightweight carbon-fiber components for aircraft, unmanned systems, and munitions.
3+ YOEBachelor's degree in engineering or science, 3+ years of composite materials industry experience for mid-level or 5+ years with technical leadership for senior-level, materials characterization, testing, failure analysis, and U.S. Person status required.
Thermogravimetric Analysis (TGA), Dynamic Mechanical Analysis (DMA), Differential Scanning Calorimetry (DSC), Thermal Mechanical Analysis (TMA), JMP, Minitab, AS9100, NADCAP, MIL-SPEC
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Materials & Process (M&P) Engineer
El Segundo, California, United States
$130k-$165k/yr OnsiteFull Time
Space Kinetic
Space Kinetic: Privately held dual-use space technology startup building one-to-many payload deployment systems for national-security space operations.
3+ YOEBachelor's degree in a relevant engineering field and 3–7 years of materials and processes experience with spaceflight or high-reliability aerospace hardware, including metals, composites, thermal materials, and failure investigations.
NASA-STD-6016
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Senior Materials and Process Engineer (Onsite)
Riverside, California, United States
$96k-$182k/yr OnsiteFull Time
Collins Aerospace
Collins Aerospace: Aerospace and defense systems manufacturer and service provider for airlines, aircraft operators and governments.
5+ YOESTEM degree with 5+ years' relevant experience (or advanced degree with 3+ years), experience with composites, prepregs, structural adhesives, technical writing, Microsoft Word/Excel, and supplier qualifications; U.S. Person required.
Microsoft Word, Microsoft Excel, SAP, Teamcenter
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2026 Intern Conversion - Materials and Process Engineer I
Seattle or Van Horn or Denver or Huntsville or Florida or Arlington or Los Angeles or Longmont or Reston or United States
$75k-$114k/yr OnsiteFull Time
Blue Origin
Blue Origin: Developing reusable space vehicles and infrastructure.
Completed a 2026 Blue Origin internship; enrolled in or recently graduating from college; minimum B.S. in mechanical, aerospace, or astronautical engineering; strong communication and teamwork skills; U.S. work authorization required.
Defense Biometric Identification System (DBIDS)
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Applied Scientist, Materials and Process Development, AWS Center for Quantum Computing
Pasadena, California, United States
$143k-$193k/yr OnsiteFull Time
Amazon
AmazonNASDAQ: AMZN: Multinational technology focused on e-commerce and cloud computing.
PhD in engineering, physics, or materials science; expertise in thin-film deposition and 200 mm wafer scale; strong materials characterization and cross-functional collaboration.
Thin-film deposition, Materials characterization, Semiconductor process integration
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