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Tem Engineer Jobs in California (NOW HIRING)

Materials Engineer

San Francisco, CA · On-site

$100K - $140K/yr

Proficiency with materials characterization tools such as XRD, SEM, TEM, BET, TGA/DSC, and ... Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale.

New

Product Engineer

Santa Clara, CA · On-site

$156K - $160K/yr

Master's degree in Electrical Engineering, Physics, Material Science or a related field. One year ... as TEM, EDX, and OBIRCH. Annual base salary for this role in California, US is expected to be ...

Product Engineer

Santa Clara, CA · On-site

$156K - $160K/yr

Master's degree in Electrical Engineering, Physics, Material Science or a related field. One year ... as TEM, EDX, and OBIRCH. Annual base salary for this role in California, US is expected to be ...

Process Technician

Santa Clara, CA · On-site

$30 - $31.50/hr

Coordinate with engineering on job request status. · Operate supportive metrology equipment for FIB-TEM lamella samples. Qualifications: · Education: Technical Diploma Skills Certifications · ...

Robotics Engineer

San Diego, CA · Hybrid

$48.08 - $62.50/hr

Robotics Engineer This role offers the opportunity to lead a new research and development project focused on designing and programming an autonomous industrial vehicle using the Robotics Operating ...

Semiconductor R&D Engineer

Milpitas, CA · On-site

$120K - $180K/yr

We are seeking an R&D engineer with a strong experimental-science background to advance eProbe ... Experience with electron microscopes (SEM, TEM) or other ebeam or semiconductor test equipment

Staff Wafer Process Engineer

San Jose, CA · On-site

$108K - $155K/yr

Guide process engineers and technicians, promoting a culture of technical excellence and data ... Advanced proficiency in Ellipsometry, SEM-EDX, TEM, AFM, XPS, FIB, XRR, SAXS, FTIR, and Defect ...

PhD in Chemical Engineering, Materials Science, Physics, Electrical Engineering, or a semiconductor ... Experience with materials and device characterization techniques, including SEM, TEM, CD SEM, AFM ...

Showing results 41-60

Tem Engineer information

What is the difference between Tem Engineer vs Mechanical Engineer?

AspectTem EngineerMechanical Engineer
Required CredentialsBachelor's in Mechanical, Electrical, or related field; certifications like Certified Manufacturing Engineer (CMfgE) are a plusBachelor's or higher in Mechanical Engineering; PE license optional but beneficial
Work EnvironmentManufacturing plants, production lines, assembly facilitiesDesign offices, manufacturing plants, R&D labs
Employer & Industry UsageManufacturing companies, OEMs, industrial plantsEngineering firms, manufacturing, automotive, aerospace

Tem Engineers focus on manufacturing processes, quality control, and production efficiency, often working directly in factories. Mechanical Engineers have a broader scope, including design, analysis, and development of mechanical systems. Both roles require technical skills, but Tem Engineers are more production-oriented, while Mechanical Engineers are involved in design and innovation.

What job categories do people searching Tem Engineer jobs in California look for? The top searched job categories for Tem Engineer jobs in California are:
What cities in California are hiring for Tem Engineer jobs? Cities in California with the most Tem Engineer job openings:
Infographic showing various Tem Engineer job openings in California as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution.

Materials Engineer

Mariana Minerals

San Francisco, CA • On-site

$100K - $140K/yr

Full-time

Posted yesterday

New


Job description

About Mariana Minerals
Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We're reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.
Role Overview
Mariana Minerals is seeking a highly motivated Materials Engineer to join our R&D and product development team. The successful candidate will be responsible for designing, developing, and optimizing processes for novel material synthesis - from lab-scale proof-of-concept to pilot and commercial scale implementation. This position will play a critical role in translating laboratory discoveries into scalable, economically viable production processes.
What You'll Do
  • Conduct lab-scale and pilot scale wet chemical synthetic experiments to validate proof-of-concept ideas and develop new material formulations.
  • Design and execute experiments to establish reaction parameters, yield optimization, and reproducibility.
  • Evaluate and select equipment and process configurations for pilot-scale and commercial-scale operations.
  • Develop process flow diagrams (PFDs), process and instrumentation diagrams (P&IDs), and mass/energy balances.
  • Collaborate with multidisciplinary teams including R&D scientists, operations, and external vendors to ensure smooth scale-up.
  • Support process safety reviews, risk assessments, and environmental compliance planning.
  • Collect and analyze process data to identify areas for optimization, cost reduction, and performance improvement.
  • Prepare technical documentation, reports, and presentations for internal and external stakeholders.
  • Work closely with cross-functional teams including lab technicians, pilot plant engineers, process engineers, project execution teams, and more to scale designs from lab through to commercial scale
  • Work closely with the software and machine learning teams to automate capital project execution workflows and develop reactor and plant optimization algorithms
What You'll Bring
  • MS degree in Materials Science, Chemistry, Materials Engineering, or Chemical Engineering (PhD preferred).
  • Hands-on experience in materials synthesis (e.g., solid-state, hydrothermal, precipitation, or other chemical synthesis techniques).
  • Proficiency with materials characterization tools such as XRD, SEM, TEM, BET, TGA/DSC, and spectroscopic methods.
  • Experience with process design, equipment specification, and scale-up of laboratory processes to pilot or production scale.
  • Strong analytical and problem-solving skills with a data-driven approach.
  • Excellent communication and teamwork skills in a multidisciplinary environment.
  • Familiarity with process simulation tools (e.g., OLI systems or equivalent) is a plus.
Our culture is built on three principles:
Extreme Ownership - We take full responsibility for outcomes, relentlessly driving toward solutions.
Engineer Out Requirements, then Automate - We simplify, optimize, and then automate for scale.
Share Your Legos - We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.
Join us as we build the future of responsible mineral sourcing and supply.