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July 18, 2026

Senior Principal Mechanical Engineer

Senior

185,004 - 200,004 USD

San Francisco Bay Area, CA

Diamond Foundry Inc. is solving the thermal limitation at the foundation of today's most exciting tech industries -- AI & cloud compute, electric-car power electronics, and 5G/6G wireless. We have managed to produce the world's first single-crystal diamond wafers and are now on a mission to put a diamond behind every chip.

We’re looking for an ambitious Mechanical Engineer to take responsibility for designing capital equipment and facilities systems, working across multiple engineering disciplines. You'll be working with an experienced team of mechanical and electrical engineers to take a pragmatic approach to equipment and facility design. You’ll be responsible for whole projects, pulling in the talents of others when needed.

This position will work out of our South San Francisco location.

Responsibilities

  • Designing, building, testing, and optimizing systems for high-volume capital equipment and high vacuum manufacturing equipment.
  • Prototyping and integration of new system functions to enhance existing equipment
  • Managing multiple domestic and international suppliers to construct parts and assemblies on time and within budget
  • Effective communication skills and ability to convey complex technical concepts to diverse stakeholders

Requirements

  • Bachelor's or Master's degree in Mechanical Engineering or a related field with 15+ years of applicable engineering design experience for high-volume, low-cost manufacturing tools.
  • Experience in 2D and 3D CAD (specifically AutoCAD and SolidWorks), proficiency in PDM and/or PLM software and systems, experience with welded steel frames, sheet metal, machined parts, process piping design and related connections, and documentation for high-volume builds.
  • Experience with electrical and pipe routing design such as high purity gases, caustic and explosive gases, manual and automatic valves, and experience with their appropriate use.
  • Experience with commercially available piping connection systems for high pressure and high vacuum, welding methods, and applicable safety considerations for these systems.
  • Experience with mechanical automation, repetitive moving systems, material flow, robotics, precision alignment of large tools, and facilities design.
  • Strong analytical skills to investigate and provide solutions for problems across multiple systems within a facility
  • Excellent problem-solving skills and ability to work in a fast-paced, collaborative environment

Benefits

Diamond Foundry believes in supporting employees from the workplace to their personal and home life. Benefits generally include health insurance, flexible spending accounts, retirement savings plans, life and disability insurance programs, paid and unpaid time away from work, and employee discounts. Benefits begin as early as the first day of employment.

Manufacturing and Engineering Departments Physical Requirements

  • Use appropriate PPE and follow all safety policies, practices, and procedures.
  • Sit, stand for long periods, walk, grasp, reach with hands and arms, lift below and above shoulders, bend, twist at the waist, climb, balance, stoop, squat, kneel, crawl, talk, hear, see, use fine finger manipulation, and complete repetitive motions.
  • Some tasks may require the use of ladders or stairs
  • Some tasks may require driving or the use of foot controls
  • Lift/carry and push/pull up to 50 pounds

This employer participates in E-Verify and will provide the federal government with Form I-9 information to confirm authorization to work in the U.S.

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By treating manufacturing as a single integrated system, the company enables complex hardware to be designed, built, and scaled efficiently. As a Mechanical Engineer (Site Infrastructure), you will bridge the gap between site infrastructure and next-generation autonomous manufacturing. You will work with complex mechanical systems powering the proprietary Skyfall printing platform, including industrial fluid and cooling systems, high-pressure gases, and factory performance monitoring systems using sensors and data acquisition. This role is critical for deploying and scaling hardware infrastructure globally while collaborating with interdisciplinary engineering teams to create advanced infrastructure solutions. 3D printing experience is not required. The ideal candidate is organized, accountable, collaborative, proactive, and motivated to scale world-class hardware operations. Responsibilities: - Design and implement custom infrastructure for the Skyfall printing system, including thermal management systems, industrial plumbing, and high-flow gas delivery - Develop and integrate factory performance monitoring systems using sensors and data acquisition (DAQ) for real-time utility visibility - Oversee critical utilities including power, process water, nitrogen, and argon in compliance with safety codes - Define and implement preventive maintenance for pumps, compressors, and HVAC systems to optimize efficiency and reduce downtime - Secure availability of specialized fluid system components and high-pressure fittings for infrastructure projects Basic Qualifications: - Bachelor's degree in mechanical or aerospace engineering or similar engineering discipline - 2+ years of facilities engineering, factory engineering, launch/ground systems engineering, or related experience - Strong first principles understanding of fluid mechanics, thermodynamics, and heat transfer - Hands-on ability to troubleshoot and repair complex mechanical and fluid systems Nice to Have: - Experience with Environmental, Health, and Safety (EHS) practices, including high-pressure gas safety (NFPA 55) and metal powder handling - Proficiency in 3D CAD software such as SolidWorks or NX for facility layouts, piping routes, and mechanical mounts - Experience scaling automated manufacturing lines or high-volume production infrastructure - Experience with industrial automation controls, PLCs, or building management systems (BMS) - Background in aerospace ground support or rocket engine test site operations involving cryogenic or high-pressure fluid systems - Experience managing external MEP contractors during facility buildouts - Knowledge of ITAR, ISO 9001, or similar industrial compliance standards - Experience with metal additive manufacturing or powder-based industrial processes - Strong verbal and written communication skills for presenting technical infrastructure plans Location: Based in Hawthorne, the vertically integrated facility combines technology development, R&D, and production in a collaborative onsite environment. This role requires full-time onsite presence five days per week with limited exceptions. What We Offer: - Inclusive and collaborative culture focused on learning and data-driven decision-making - Opportunity to contribute to rapidly scaling manufacturing technology Benefits: - Significant stock option packages - 100% employer-paid medical, dental, and vision insurance - Life insurance - Traditional and Roth 401(k) - Relocation assistance - Paid vacation, sick leave, and company holidays - Paid parental leave and transition support - Free catered lunch and dinner with stocked kitchenette - Casual dress, flexible work hours, and team-building events Compensation: The estimated salary range for this role is $90,000-$150,000, depending on experience, education, and demonstrated skills. Additional compensation includes a significant stock option package. Freeform is an Equal Opportunity Employer and evaluates candidates based on merit, competence, and qualifications.

Technology

Samsung

Director, Foundry Customer Engineering

Senior

On-site

San Jose, CA

🏢 Summary: Senior leadership role managing semiconductor foundry customer programs from business development through NPI to full production, acting as the primary technical interface between customers and internal engineering teams. The position focuses on driving customer satisfaction, production milestones, and business growth through semiconductor engineering expertise and cross-functional collaboration. 🗂️ Requirements: Bachelor’s degree in Electrical Engineering or related Physical Science with 20+ years of experience, OR Master’s degree in Electrical Engineering or related Physical Science with 18+ years of experience, OR PhD in Electrical Engineering or related Physical Science with 15+ years of experience, Recent semiconductor process, product, or device engineering experience, Experience working with semiconductor foundry or Integrated Device Manufacturer companies, Project management experience, Customer-facing technical account management skills, Proficiency in Microsoft PowerPoint and Excel, Strong communication and presentation skills 📃 Skills: Semiconductor, Foundry, NPI, Engineering, ProjectManagement, PowerPoint, Excel, Mandarin 🏢 Description: Advancing the World's Technology Together Our technology solutions power the tools you use every day—including smartphones, electric vehicles, hyperscale data centers, IoT devices, and more. This opportunity offers the chance to contribute to innovative semiconductor technologies and support the future of advanced manufacturing. What You'll Do The Director Foundry Customer Engineering (CE) will manage customer programs across various process technologies. This position requires collaboration with customer and internal stakeholders from business development to new product introduction (NPI) through full production. Responsibilities include: - Support internal account strategy plans and coordinate business and engineering execution alignment - Provide customer satisfaction by responding to account actions and driving collaboration on technical and cost-effective solutions - Partner with engineering and business groups to ensure NPI activities meet customer schedules and technical requirements - Drive manufacturing teams to achieve production milestones and business goals - Complete additional responsibilities as assigned Location: Daily onsite presence at the San Jose headquarters with less than 10% domestic and international travel. Reports to: Sr. Director, Customer Engineering What You Bring - Bachelor’s degree in Electrical Engineering or related Physical Science with 20+ years of experience - OR Master’s degree in Electrical Engineering or related Physical Science with 18+ years of experience - OR PhD in Electrical Engineering or related Physical Science with 15+ years of experience - Recent experience in semiconductor process, product, or device engineering required - Previous experience with semiconductor foundry or Integrated Device Manufacturer companies preferred - Previous project management experience preferred - Strong customer orientation, communication, and presentation skills - Proficiency in Microsoft PowerPoint and Excel - Professional working proficiency in Mandarin is a plus - Ability to collaborate across diverse global teams - Strong learning agility, curiosity, and resilience - Innovative and adaptable mindset What We Offer - Competitive compensation with incentive opportunities - Medical, Dental, Vision, and 401(k) benefits - Charitable giving match and community involvement opportunities - 4+ weeks of paid time off plus holidays and sick leave - Family support benefits including fertility, adoption, and medical travel support - Emotional wellness resources and confidential therapy sessions - Onsite café and gym plus virtual fitness classes - Flexible work environment Base Pay Range: $219,000—$351,000 USD Equal Opportunity Employment Policy Samsung Semiconductor is committed to fostering an inclusive workplace and providing equal employment opportunities for all individuals. Accommodations are available throughout the recruiting process for candidates who require support. Our Commitment to Innovation and Fairness AI tools may be used to support recruitment efficiency, but all hiring decisions are made by human recruiting teams and hiring managers. Applicant AI Use Policy Candidates are expected to rely on their own knowledge and skills throughout the hiring process. AI tools may only be used for basic preparation, grammar, and research. Trade Secret Notice Applicants must not disclose confidential or proprietary information belonging to current or former employers.

Technology

New offer

Charm Industrial

Mechanical Engineer II (Pyrolysis)

Mid

Fort Lupton, CO

74,400 - 111,600 USD

🏢 Summary: Mechanical Engineer role focused on designing, testing, commissioning, and improving next-generation pyrolysis and biomass processing systems for carbon removal operations. The position involves hands-on mechanical design, troubleshooting production equipment, and collaborating with cross-functional engineering teams to scale industrial hardware. Candidates will work on electromechanical systems, thermal and flow analysis, and production support in a fast-paced manufacturing environment. 🗂️ Requirements: Bachelor’s degree in Mechanical Engineering or related field, 3-5 years of mechanical design experience, CAD proficiency, Experience with DFMA, Experience with FMEA, Knowledge of GD&T, Experience creating and releasing engineering drawings, Familiarity with electromechanical systems, Hands-on mechanical troubleshooting experience, Mechanical assembly experience, Knowledge of heat transfer principles, Experience selecting sensors and actuators, Documentation skills, Cross-functional communication skills 📃 Skills: OnShape, CAD, DFMA, FMEA, GD&T, Pyrolysis, Electromechanical, HeatTransfer, Sensors, Actuators, Pumps, Fabrication, Troubleshooting, Assembly, Thermal, Flow, Weldment, Piping, Vessels, Conveyors, Blowers 🏢 Description: About Charm Our mission is to return the atmosphere to 280 ppm CO₂. We convert excess inedible biomass into carbon-rich bio-oil and inject it into underground storage for permanent carbon removal. At scale, we can use bio-oil to make fossil-free iron. Our carbon removal efforts began in 2020 with initial purchases from customers like Stripe, Shopify, and Microsoft. Since then, we’ve scaled to thousands of tons of carbon removal, grown to over a hundred employees, and established three locations in San Francisco, Colorado, and Louisiana. We're expanding our team of ambitious, creative, and hands-on problem solvers. We value psychological safety, collaboration, and continuous learning. We take calculated risks and treat mistakes as opportunities to improve. Come help us reverse climate change. Gigatons or bust! About the Role As a Mechanical Engineer based out of our Fort Lupton facility, you’ll be responsible for designing the next generation of pyrolysis technology, implementing and troubleshooting mechanical systems in production, and collaborating with the broader engineering team, including electrical, automation, and manufacturing engineers, as well as fabricators and technicians. This group collaborates to overcome design/build/test challenges and successfully execute commissioning and production handover campaigns. This role involves designing new mechanical systems, selecting electromechanical actuators, sensors, pumps, and continually improving on our pyrolysis and biomass processing equipment. You’ll turn wrenches to help bring your designs to life and work with our Test & Process team to develop test plans to ensure your systems meet overall design intent. Often, you will be tasked with updating the configuration of legacy systems in order to validate novel design pathways or fully design new subsystems, informing the architecture of our next generation of pyrolysis equipment. In order to meet overall production and throughput goals, the role will leverage mechanical and system expertise to provide troubleshooting support for production machines based on issues observed by Operations partners. Someone successful in this role will enjoy bringing new designs to life and helping to test and commission their new equipment. This person takes pride in delivering robust mechanical solutions that work in the real world, and loves stepping through the root cause analysis process when systems are not performing as intended. This person also takes an analytical approach to problem solving and is not afraid to step out of their comfort zone when tackling new problems. Your Responsibilities - Design unique solutions for next generation operations pyrolyzer - Develop mechanical and electromechanical systems for production use - Conduct engineering analysis with thermal and flow models - Refine process piping and vessel mechanisms - Troubleshoot mechanical system malfunctions and performance gaps - Implement corrective actions to restore optimal system performance - Develop and execute test plans and commissioning campaigns - Validate hardware performance before and after installation - Collaborate with electrical engineers, software developers, and mechanical engineers - Support on-call production troubleshooting when needed You Bring - Bachelor’s degree in Mechanical Engineering or related field - 3-5 years of mechanical design experience - CAD knowledge, including OnShape - Skilled in heat transfer, sensor and actuator selection, and project requirements development - Experience with DFMA and FMEA - Familiarity with GD&T and fabrication techniques - Proficiency creating and releasing engineering drawings - Familiarity with electromechanical systems - Hands-on troubleshooting and assembly experience - Strong documentation and communication skills - Ability to work cross-functionally with engineers and fabricators - Willingness to work directly with pyrolysis system hardware Bonus Qualifications - OnShape modeling experience - Weldment design experience - Process piping and vessel design - Industrial equipment design experience - Bulk material handling experience with conveyors, pumps, and blowers - Experience with 24/7 operations What We Offer - Equity ownership through stock options - 100% employee healthcare premiums covered - Medical, dental, and vision coverage - Employer-funded HSA contributions - Traditional and Roth 401(k) with company match - Paid parental and medical leave - PPE and workwear allowances - Professional development stipend - Employee recognition programs - Opportunities for career growth and development Visa Sponsorship Policy Charm Industrial currently sponsors E3 and TN visas. Our Commitment Charm Industrial is an equal opportunity employer. We hire based on skills, experience, and passion for the mission. Applicants from all backgrounds are encouraged to apply.

Technology

Samsung

Staff Engineer, Mechanical Simulation

Senior

On-site

San Jose, CA

🏢 Summary: Staff Engineer role focused on mechanical and thermal simulation for next-generation semiconductor packaging and memory devices, including modeling, reliability analysis, and workflow automation. The position involves cross-functional collaboration, validation testing, and development of advanced packaging solutions using industry-standard simulation tools. Daily onsite work in San Jose with some domestic and international travel is required. 🗂️ Requirements: Ph.D. in Mechanical Engineering, Materials Science, Physics, or related field, 3+ years of modeling and simulation experience in semiconductor or high-tech industry, Expertise with ANSYS, Abaqus, HyperMesh, Proficiency with Flotherm and Icepak, Experience with static and dynamic linear and nonlinear simulations, Knowledge of advanced semiconductor packaging and interconnect structures, Experience with reliability modeling techniques, Ability to develop automation scripts in Python, MATLAB, or ANSYS APDL, Technical writing and documentation skills, Ability to work with cross-functional global teams 📃 Skills: ANSYS, Abaqus, HyperMesh, Flotherm, Icepak, Python, MATLAB, APDL, Simulation, Modeling, Thermal, Mechanical, Semiconductor, Packaging, Reliability 🏢 Description: Please Note: To provide the best candidate experience amidst our high application volumes, each candidate is limited to 10 applications across all open jobs within a 6-month period. Advancing the World's Technology Together Our technology solutions power the tools you use every day--including smartphones, electric vehicles, hyperscale data centers, IoT devices, and so much more. Here, you'll have an opportunity to be part of a global leader whose innovative designs are pushing the boundaries of what's possible and powering the future. We believe innovation and growth are driven by an inclusive culture and a diverse workforce. We're dedicated to empowering people to be their true selves. Together, we're building a better tomorrow for our employees, customers, partners, and communities. Join Samsung Semiconductor to guide the development and design evaluation of next‑generation semiconductor packages and memory devices. In this role as a Staff Engineer for Mechanical Simulation, you will partner with cross‑functional, multicultural teams to advance innovative packaging solutions, automate simulation workflows, and bridge the gap between numerical predictions and experimental validation. Location: Daily onsite presence at our San Jose headquarters in alignment with our Flexible Work policy with 10-20% of domestic and international travel. Reports to: Principal Engineer What You'll Do - Perform advanced numerical modeling and simulation to evaluate and improve the performance and reliability of cutting‑edge semiconductor packages and memory devices. - Provide mechanical and thermal design support throughout package‑ and system‑development stages—from concept and detailed modeling to qualification and reliability testing. - Apply hands‑on expertise in mechanical and thermal modeling of micro‑electronic components, including interconnects, solder joints, BGAs, and advanced‑packaging architectures. - Develop and maintain scripts for process automation (Python, MATLAB, or ANSYS APDL) to streamline pre‑processing, simulation, and post‑processing workflows for parametric and sensitivity studies. - Leverage a solid understanding of semiconductor manufacturing, advanced‑packaging technologies, material properties, and associated design and reliability constraints. - Design, execute, and interpret validation experiments that correlate and calibrate simulation models with empirical data. - Contribute effectively both independently and as a member of cross‑functional, cross‑cultural, and globally distributed teams. What You Bring - Ph.D. in Mechanical Engineering, Materials Science, Physics, or a related field. (Equivalent combination of a Master's degree and extensive professional experience also welcomed). - 3+ years of hands‑on modeling and simulation experience in the high‑tech or semiconductor industry. - Proven expertise with leading simulation tools such as ANSYS, Abaqus, HyperMesh, and their associated pre‑/post‑processing software. - Proficiency in thermal‑analysis platforms Flotherm and Icepak, together with related utilities. - Extensive experience in static and dynamic simulations, covering linear and nonlinear analyses. - Deep knowledge of design strategies for advanced packaging solutions. - In‑depth understanding of advanced semiconductor packaging, interconnect structures, and reliability‑modeling techniques. - Strong technical‑writing skills, capable of producing clear, comprehensive documentation and communicating complex concepts to both technical and non‑technical audiences. - You're inclusive, adapting your style to the situation and diverse global norms of our people. - An avid learner, you approach challenges with curiosity and resilience, seeking data to help build understanding. - You're collaborative, building relationships, humbly offering support and openly welcoming approaches. - Innovative and creative, you proactively explore new ideas and adapt quickly to change. What We Offer The pay range below is for all roles at this level across all US locations and functions. Pay within this range varies by work location and may also depend on job-related knowledge, skills, and experience. We also offer incentive opportunities that reward employees based on individual and company performance. This is in addition to our diverse package of benefits centered around the wellbeing of our employees and their loved ones. - Give Back With a charitable giving match and frequent opportunities to get involved, we take an active role in supporting the community. - Enjoy Time Away You'll start with 4+ weeks of paid time off a year, plus holidays and sick leave, to rest and recharge. - Care for Family including fertility care or adoption support, medical travel support, and virtual vet care. - Prioritize Emotional Wellness with on-demand apps and free confidential therapy sessions. - Stay Fit with onsite café and gym, plus virtual classes. - Embrace Flexibility with a flexible work environment. Base Pay Range $163,000—$253,000 USD Equal Opportunity Employment Policy Samsung Semiconductor takes pride in being an equal opportunity workplace dedicated to fostering an environment where all individuals feel valued and empowered to excel. Our Commitment to Innovation and Fairness At Samsung Semiconductor, AI tools may be used in the recruitment process to enhance efficiency, but all hiring decisions are made by human recruiting teams and hiring managers. Applicant AI Use Policy Candidates may use AI tools for preparation, grammar, and research, but not for generating submitted content or live interview responses. Trade Secret Notice By submitting an application, you agree not to disclose confidential or proprietary information belonging to a current or former employer or other entity.