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71 principal mechanical engineer jobs found

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Full time principal mechanical engineer California
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CF
Apr 19, 2026
Full time
Principal Mechanical Engineer
Commonwealth Fusion Systems Milpitas, CA
About Commonwealth Fusion Systems: Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy. Combining decades of research, top talent, and new technologies, we're designing and building commercially viable fusion power plants. And we're working with policymakers and suppliers to build the energy industry of the future. We're in the best position to make it happen. Since 2018, we've raised nearly $3 billion in capital, making us the largest and leading private fusion company in the world. Now we're looking for more thinkers, doers, builders, and makers to join us. People who'll bring new perspectives, solve tough problems, and thrive as part of a team. If that's you and this role fits, we want to hear from you. Join the power movement as a Principal Mechanical Engineer We're looking for a Principal Mechanical Engineer to join our R&D and equipment design team to help build the next generation of thin-film deposition technology....
BH
Apr 16, 2026
Full time
Associate Principal Mechanical Engineer
$150,000 - $185,000 yearly
Buro Happold Los Angeles, CA
Start designing tomorrow's future! Buro Happold has an exciting opportunity for a talented and experienced Mechanical Engineer to join our team in Los Angeles, California! The Associate Principal Mechanical Engineer will play a pivotal role in providing technical expertise and leadership to our Building Environments Group. You will work closely with clients, architects, other Buro Happold Engineers, and/or design team members as part of a dedicated and skilled team. Here at Buro Happold, expect the exceptional. From the projects you will work on to the clients we work with. From career-defining opportunities to an inclusive and diverse practice where we all contribute to a more equitable world. From our reputation to our relationships. Wherever your Buro Happold career takes you, it'll be anything but ordinary. Your next role Join us and be surrounded by exceptional opportunities in an environment alive with innovation and possibility. Your new team has a...
WC
Apr 11, 2026
Full time
Principal Mechanical Engineer
Waters Corporation Goleta, CA
Overview Waters Corporation is seeking a Principal Mechanical Engineer to become a key contributor of our Light Scattering instrumentation in Goleta California. In this role, the individual will drive new product innovation in the development of next generation Liquid Chromatography and Mass Spectrometry instruments and systems. Working in a multi-disciplinary environment where high precision mechanical design intersects with physics, electronics, firmware, software and chemistr y, the contributor will be responsible for multiple aspects of mechanical design , analysis and test of subsystems and complete instruments from concept through to production. Responsibilities Develop and create detailed design and mechanical layout of components, subassemblies, and top-level instruments from concept through production Develop and review design concepts, drawings, bills of material, and assembly processes Conduct detailed engineering analysis and test of...
No
Apr 22, 2026
Full time
Principal Mechanical HW Development Engineer
Nokia San Jose, CA
Job Description As a Principal Mechanical Engineer at Nokia, you'll work on innovative projects that push the boundaries of telecommunications technology. Collaborating with cross-functional teams, you'll translate concepts into production-ready solutions, focusing on mechanical, thermal, and electrical integration. You'll have the opportunity to guide design initiatives, influence product features, and engage with both internal departments and external suppliers to streamline production processes. Nokia offers a dynamic work environment that fosters creativity and problem-solving. You'll benefit from professional development opportunities, flexible work arrangements, and a competitive compensation package. Join us in shaping the future of connectivity while enjoying a balanced work-life experience in a supportive culture that values collaboration and excellence. Responsibilities Drive mechanical and thermal design from product concept to production with minimal supervision....
IV
Apr 06, 2026
Full time
Principal Mechanical Engineer
II-VI Aerospace & Defense Fremont, CA
Job Description Primary Duties & Responsibilities Responsible for CPO/XPO/liquid cooling Lead and manage CPO/XPO/Liquid cooling Education & Experience B.S. or M.S. in Mechanical Engineering. 5+ years of mechanical design experience. Knowledge of a variety of (metal) manufacturing methods, e.g. machining, stamping, molding, welding, brazing, casting, plating, 3D printing, etc. Knowledge and experience in sheet metal fabrication and rack and chassis designs Strong analytical and computational skills in structural, heat transfer, fluid dynamics, and tolerance studies for mechanical and thermal consideration. Experience in semiconductor laser diodes, laser alignment, diode laser packaging, fiber optics, fiber coupled lasers, fiber lasers, and diode laser optics. Able to multitask between several projects and designs and handle a lot of details. Must be self-motivated with the ability to work effectively in a team environment and meet project...
No
Mar 15, 2026
Full time
Principal Mechanical Design Engineer
Nokia Sunnyvale, CA
Job Description Join our Applied R&D Electromechanical Design team and work at the forefront of multi-discipline innovation, where you'll tackle complex, target-oriented challenges spanning hardware, software and system design. In this role, you will contribute to the design, development and implementation of electromechanical solutions for Base Transceiver Station (BTS) modules and units, including mechanics, thermal management, interconnections, power supply units (PSU), printed wiring board (PWB) layouts and overall hardware usability. You will systematically combine existing knowledge and best practices to solve real-world problems, provide techno-economic consulting to internal and external stakeholders, and drive incremental improvements in products, operational processes and customer-specific features. If you are passionate about creating high-quality, highly reliable, easy-to-install, and cost-efficient products in a detailed and technically challenging...
SA
Apr 26, 2026
Full time
Elec. Eng./Motor Control Design Engineer
Sulzer AG Santa Ana, CA
Sulzer is a leading engineering company with a proud heritage of innovation. Join our global team to grow your expertise and develop innovative solutions that enable a prosperous and more sustainable society. About the role Position Summary This position operates within the Order Related Engineering (ORE) department and is responsible for designing Sales Order specific motor control electrical schematics and entering the associated bill of material (BOM) into the ERP system. This position closely works with Project Engineer to support the submittal package and provide electrical expertise to the customers. Upon approval of the submittal package, this position is accountable for generating part numbers in the ERP system and releasing the finalized package to production. Furthermore, this position provides electrical engineering expertise to Tendering and Operations by reviewing project specifications and offering recommendations Principal Duties and Responsibilities • Review...
TM
Apr 26, 2026
Full time
Manufacturing Engineer II
TriMas Corporation Simi Valley, CA
Manufacturing Engineer II Company: RSA Engineered Products LLC Primary Location: 110 West Cochran Street, Unit A, Simi Valley, CA 93065 USA Workplace Type: On-site Employment Type: Salaried | Full-Time Function: Engineering Equal Opportunity Employer Minorities/Women/Veterans/Disabled Main Duties & Responsibilities Company: PennAero is hiring a Manufacturing Engineer at our RSA Engineered Productslocation in Simi Valley, CA. RSA provides flight-critical components andassemblies for the commercial, defense and business jet markets. RSA designsand produces custom-engineered high pressure/high-temperature ductingassemblies for each customer's specific performance requirements. RSA'sPeri-SealTM is one of the most sought-after connectors in the aerospaceindustry. Additionally, RSA designs and produces flexible joints and hoses,ozone converters and many complex assemblies to meet stringent customer needs. About PennAero: PennAero is a leading manufacturer of highly...
WM
Apr 26, 2026
Full time
Lead Commissioning Engineer
$140,000 - $170,000 yearly
Wunderlich-Malec Sacramento, CA
Wunderlich-Malec Engineering (WM) is a 100% employee-owned ESOP and one of the largest and most well-established engineering companies in the United States. When you join WM you become part of a company that is: 100% employee-owned with 40+ years of industry history ENR (Engineering News Record) Top 500 firm Rated as a top System Integrator Giant We have a Lead Commissioning Engineer opportunity available in Sacramento, CA. This person will be responsible for the leading the testing and commissioning of electrical equipment within and electrical substation or generator plant; performing and directing all aspects of electrical testing including, but not limited to, protection relays, circuit breakers, transformers and other substation equipment; and training new engineers/technicians in relay testing, equipment testing and substation commissioning. Ideal Candidate Qualifications Knowledge of programming and testing protection relays from GE, SEL, ALSTOM, SCHNEIDER,...
ST
Apr 23, 2026
Full time
Sr Principal Engineer
$125,925 - $188,887 yearly
Solar Turbines Incorporated San Diego, CA
Career Area: Engineering Job Description: Your Work Shapes the World at Caterpillar Inc. When you join Caterpillar, you're joining a global team who cares not just about the work we do - but also about each other. We are the makers, problem solvers, and future world builders who are creating stronger, more sustainable communities. We don't just talk about progress and innovation here - we make it happen, with our customers, where we work and live. Together, we are building a better world, so we can all enjoy living in it. About the Role: The Turbine Production Engineering (TPE) department provides our manufacturing, operations, and supply chain partners with technical engineering support related to Solar's gas turbine components and assemblies. TPE engineers are expected to support all engine model lines with respect to their accountable part family. This position requires extensive collaboration with internal customers within manufacturing, operations, supply chain,...
Co
Apr 19, 2026
Full time
Water Utility Project Engineer
City of Palo Alto, CA Palo Alto, CA
Salary : $153,524.80 - $202,030.40 Annually Location : Elwell Court 1007 Elwell Court Palo Alto, CA Job Type: Regular Full-Time Job Number: 202501221 Department: Utilities Department Opening Date: 04/17/2026 Closing Date: Continuous Description The City of Palo Alto Utilities is the only city in California that offers a full range of utility services to its citizens and businesses. This gives the City a unique opportunity to collaborate with the Palo Alto community, providing homegrown, reliable, and environmentally focused utilities. With over 130 years of successful public utility operations, Palo Alto continues its tradition of delivering safe services, local decision-making on policies, utility rate-setting, environmental programs, and tailored solutions for the community. Join the City as Project Engineer , where you'll shape safety standards, lead innovative projects, and ensure the efficiency of vital water systems for our community! Career Opportunity...
ST
Apr 18, 2026
Full time
Principal Engineer NPI Product Definition
Solar Turbines Incorporated San Diego, CA
Career Area: Engineering Job Description: Your Work Shapes the World at Caterpillar Inc. When you join Caterpillar, you're joining a global team who cares not just about the work we do - but also about each other. We are the makers, problem solvers, and future world builders who are creating stronger, more sustainable communities. We don't just talk about progress and innovation here - we make it happen, with our customers, where we work and live. Together, we are building a better world, so we can all enjoy living in it. Role Definition Designs, develops, builds, and implements new components, products, or technologies in a self directed manner. Supports engineers with creation of product or project definition, prepares 3D models, drawings and specifications, and records data. This role also leverages advanced CAD and PLM tools-including Creo, Windchill, Creo View, and Model Based Definition (MBD)-to support new designs, updates, and complex engineering studies....
NB
Apr 18, 2026
Full time
Principal Facilities Engineer | Onsite San Diego HQ
Neurocrine Biosciences, Inc. San Diego, CA
Who We Are: At Neurocrine Biosciences, we pride ourselves on having a strong, inclusive, and positive culture based on our shared purpose and values. We know what it takes to be great, and we are as passionate about our people as we are about our purpose - to relieve suffering for people with great needs. What We Do: Neurocrine Biosciences is a leading neuroscience-focused, biopharmaceutical company with a simple purpose: to relieve suffering for people with great needs. We are dedicated to discovering and developing life-changing treatments for patients with under-addressed neurological, neuroendocrine and neuropsychiatric disorders. The company's diverse portfolio includes FDA-approved treatments for tardive dyskinesia, chorea associated with Huntington's disease, classic congenital adrenal hyperplasia, endometriosis* and uterine fibroids,* as well as a robust pipeline including multiple compounds in mid- to late-phase clinical development across our core therapeutic...
EL
Apr 17, 2026
Full time
Principal Engineer, R&D, Delivery Systems
Edwards Lifesciences Corporation Irvine, CA
Innovation starts from the heart. At Edwards, we put patients first. We invest a significant proportion of our revenue towards research and development to drive and develop groundbreaking medical innovations for structural heart disease. As part of our R&D Engineering team, you will work closely with our Quality and Manufacturing teams to develop the latest tools and technologies to address significant, unmet clinical needs that impact patients' lives around the world. Patients with mitral and tricuspid heart valve disease often have complex conditions with limited treatment options. Our Transcatheter Mitral and Tricuspid Therapies (TMTT) business unit is boldly pursuing an innovative portfolio of technologies to address a patient's unmet clinical needs. It's our driving force to help patients live longer and healthier lives. Join us and be part of our inspiring journey. How you will make an impact: We are seeking a Principal Delivery System Engineer to play a key role on...
IG
Apr 16, 2026
Full time
Senior Principal Engineer - Turbine Production Engineering
$125,925 - $157,406 yearly
Intermedia Group San Diego, CA
OPEN JOB: Senior Principal Engineer - Turbine Production Engineering LOCATION: San Diego, California ***Relocation Assistance Available SALARY: $125,925 to $157,406 INDUSTRY: Engineering COMPANY: Leading manufacturer of industrial gas turbines, producing units ranging from 1 to 39 megawatts. ABOUT THE ROLE: The Turbine Production Engineering (TPE) department provides our manufacturing, operations, and supply chain partners with technical engineering support related to Solar's gas turbine components and assemblies. TPE engineers are expected to support all engine model lines with respect to their accountable part family. This position requires extensive collaboration with internal customers within manufacturing, operations, supply chain, and design engineering to address component quality, cost, and velocity. TPE engineers must be able to interpret functional design requirements, detailed engineering specifications, and manufacturing...
SA
Apr 16, 2026
Full time
Product Engineer
Sulzer AG Santa Ana, CA
Sulzer is a leading engineering company with a proud heritage of innovation. Join our global team to grow your expertise and develop innovative solutions that enable a prosperous and more sustainable society. About the role Job Summary The Mechanical Engineer is responsible for researching, planning, designing, and developing mechanical products and systems. This includes instruments, controls, engines, and machines used in energy production, transmission, and measurement. This job profile is intended for early-career professionals who apply broad theoretical knowledge and require the ability to investigate and analyze problems. Solutions are typically discussed/verified with a more senior member. Position Summary: This role supports the engineering, configuration, and validation of High Stator Turbo (HST) Compressors within the Order Related Engineering (ORE) department. Responsibilities include developing sales-order-specific mechanical and automation designs, reviewing...
WM
Apr 15, 2026
Full time
Lead Commissioning Engineer
$140,000 - $170,000 yearly
Wunderlich-Malec Auburn, CA
Wunderlich-Malec Engineering (WM) is a 100% employee-owned ESOP and one of the largest and most well-established engineering companies in the United States. When you join WM you become part of a company that is: 100% employee-owned with 40+ years of industry history ENR (Engineering News Record) Top 500 firm Rated as a top System Integrator Giant We have a Lead Commissioning Engineer opportunity available in Auburn, CA. This person will be responsible for the leading the testing and commissioning of electrical equipment within and electrical substation or generator plant; performing and directing all aspects of electrical testing including, but not limited to, protection relays, circuit breakers, transformers and other substation equipment; and training new engineers/technicians in relay testing, equipment testing and substation commissioning. Ideal Candidate Qualifications Knowledge of programming and testing protection relays from GE, SEL, ALSTOM, SCHNEIDER, SIEMENS,...
JV
Apr 12, 2026
Full time
Principal Engineer, THV Manufacturing
JenaValve Irvine, CA
Job Title: Principal Engineer, THV Manufacturing Principal Engineer I, THV Manufacturing Principal Engineer II, THV Manufacturing Principal Engineer III, THV Manufacturing Role Level: Individual Contributor Supervisor/Manager Title: Senior Global Manager, Manufacturing Engineering Job Location & Environment: Irvine, CA - Corporate Office Job Description Summary: The Principal Engineer, THV Manufacturing will lead manufacturing engineering activities supporting a commercial Class III medical device manufacturing line, acting as a key interface across Operations, Quality, Regulatory, R&D and Supply Chain. This role is responsible for maintaining and improving released manufacturing processes to ensure product quality, compliance, and supply continuity. This position will drive standard cost reduction, yield improvement, and waste elimination, while strengthening process stability and day-to-day operational performance. In parallel, the Principal...
KD
Apr 11, 2026
Full time
Principal Process Engineer
Kindeva Drug Delivery Los Angeles, CA
JOB TITLE & Employer Name: Principal Process Engineer for Kindeva Drug Delivery LP. LOCATION: 19901 Nordhoff St., Northridge, California 91324. JOB DUTIES: Provide technical support to process improvement initiatives on existing and new process lines. Act as a subject matter expert in the implementation and improvement of automated solutions to improve equipment's uptime and efficiency. Perform Design of experiment (DOE) & Statistical process control (SPC) to improve process using Minitab. Process improvement using Lean manufacturing tools, such as Kaizen, Value stream mapping (VSM), Single minute exchange die (SMED), FMEA, TPM & Poka-yoke. Expert in 21 CFR Part 820 & 21 CFR Part 11 rules. Perform root cause analysis (RCA) investigation on quality deviation and execute CAPA on time. Develop and define User Requirement specification (URS) for new process equipment. Work in conjunction with the product development team to define the commercial...
In
Mar 28, 2026
Full time
Senior Mechanical Engineer I
$150,000 - $180,000 yearly
Innoflight San Diego, CA
GROW WITH US AND STAY EXTRAORDINARY: Launch your career to new heights with Innoflight-one of San Diego's fastest-growing Aerospace and Defense innovators. Here, visionary minds engineer the future of space technology through pioneering, compact, and cyber-secure solutions. From software-defined radios to cutting-edge cryptographic systems and avionics, everything we build powers the next era of New Space. Join our small, agile, and mission-driven team where your work has real impact and your growth has no limits. We're not just reaching for the stars-we're engineering them. Let's innovate the infinite, together. A DAY IN THE LIFE: As a Senior Mechanical Engineer I at Innoflight, you will serve as a principal-level contributor providing technical leadership for the design, analysis, and integration of complex mechanical systems for aerospace and spaceflight applications. You will drive system-level solutions across multiple programs, resolve challenging engineering problems,...
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