Prototype Technician

Job Title: R&D Prototype Engineering Technician Job Description This role supports the development, build, integration, and testing of complex mechanical, electromechanical, and vacuum-based subsystems for advanced semiconductor capital equipment and related high-technology platforms. The R&D Engineering Technician works closely with design engineers in a fast-paced research and development environment to assemble precision systems, execute test plans, troubleshoot issues, and provide detailed technical feedback that drives design improvements and product reliability. Responsibilities Build, assemble, and integrate complex mechanical, electromechanical, and vacuum-based subsystems for advanced semiconductor capital equipment.Perform precision mechanical assembly and alignment of components and assemblies that require tight tolerances and high accuracy.Work with vacuum chambers and vacuum-based systems, including high-vacuum (HV) and ultra-high-vacuum (UHV) systems, as well as pumps, valves, gas delivery systems, and associated hardware.Support vacuum system assembly activities, including leak checking, troubleshooting, pump-down procedures, and system commissioning.Interpret engineering drawings, CAD models, assembly instructions, and bills of materials (BOMs) to support prototype and development builds.Partner closely with design engineers to identify assembly challenges, provide build feedback, and recommend design improvements that enhance performance and reliability.Develop, modify, and utilize test fixtures, tooling, and instrumentation to support engineering validation and system qualification activities.Execute engineering test plans, collect and document test data, and provide detailed feedback during prototype development and iterative design cycles.Troubleshoot and perform root cause analysis on mechanical, electrical, pneumatic, vacuum, and automation-related system issues.Support system integration, qualification, and performance testing while thoroughly documenting build procedures, test results, and engineering observations. Essential Skills 5+ years of hands-on technician experience supporting the development, build, integration, or testing of complex mechanical or electromechanical systems.Strong mechanical aptitude with demonstrated experience assembling precision components, mechanisms, and complex subsystems.Experience working with high-vacuum (HV), ultra-high-vacuum (UHV), or vacuum-based process equipment.Ability to independently troubleshoot mechanical, electrical, vacuum, and system-level issues.Experience developing, modifying, or utilizing test fixtures, validation setups, and engineering test equipment.Ability to read and interpret engineering drawings, mechanical assemblies, tolerance specifications, and technical documentation.Familiarity with sensors, actuators, motion control systems, pneumatics, and industrial instrumentation.Strong communication skills with the ability to provide clear, concise technical feedback directly to engineering teams.Comfort working in a fast-paced environment where designs evolve rapidly through iterative development cycles. Additional Skills & Qualifications Experience within one or more of the following environments: semiconductor capital equipment, wafer fabrication equipment, advanced manufacturing, aerospace systems, robotics and automation, precision instrumentation, vacuum technology, or research and development.Experience supporting prototype development and engineering builds in an R&D, engineering, or new product introduction (NPI) environment.Exposure to mechanical engineering or related disciplines through prior roles, training, or education.Experience collaborating cross-functionally with design, test, and manufacturing teams to refine designs and improve build processes. Work Environment The role operates within a research and development setting focused on advanced semiconductor capital equipment and other high-technology systems. You work hands-on with complex mechanical, electromechanical, and vacuum-based subsystems, including HV and UHV chambers, pumps, valves, gas delivery systems, sensors, actuators, motion control systems, pneumatics, and industrial instrumentation. The environment is fast-paced and iterative, with frequent prototype builds, engineering tests, and design changes that require adaptability and close collaboration with design engineers. Work typically takes place in a lab and engineering shop environment equipped with test fixtures, specialized tooling, and validation setups, where safety, precision, and careful documentation are essential. Job Type & Location This is a Permanent position based out of South San Francisco, CA. Pay And Benefits The pay range for this position is $120000.00 - $175000.00/yr. Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors. The compensation package includes a $120K-$175K base salary, substantial performance bonus, generous equity, $2,000/month housing stipend, and 100% employer-paid medical benefits for employees and dependents. Job Type & Location This is a Permanent position based out of South San Francisco, CA. Application Deadline This position is anticipated to close on Nov 3, 2026. Workplace Type This is a fully onsite position in South San Francisco,CA. About Actalent Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 20,000 consultants and 5,000 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500. We are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing® winner for both client and talent service. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law. If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email actalentaccommodation@actalentservices.com for other accommodation options. San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records. Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability. Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.