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240 mechanical staff engineer jobs found

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United States mechanical staff engineer California
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AE
Mar 30, 2026
Full time
Senior / Staff Mechanical Engineer, Fluid Systems
Antora Energy San Jose, CA
Antora builds and deploys thermal energy storage to power always-on industrial operations and data centers with low-cost energy. Factory-built in California, Antora's thermal batteries deliver reliable and cost-effective heat and power for industrial loads of any size. Antora is electrifying global industry while supporting U.S. manufacturing jobs, lowering costs for energy consumers, and enhancing the competitiveness of American industry. We are growing our company with people who put team and mission first, value connection through laughter and joy, and build with humility and openness. We are committed to continue building a diverse, passionate, and creative team dedicated to a future where every industrial facility, everywhere on earth, is powered by abundant, clean, low-cost energy. The Role Antora is seeking a self-driven and passionate Senior or Staff Mechanical Engineer, Fluid Systems to join our Product Development Team. In this role, you will own the design,...
FS
Mar 22, 2026
Full time
Senior / Staff Mechanical Engineer - R&D
$135,000 - $175,000 yearly
Fulfil Solutions Mountain View, CA
Fulfil is a well-funded, rapidly growing, and inclusive company that has developed a custom automation robotics system to pick and pack online orders of groceries and other consumables, bringing delight and a value proposition to consumers that doesn't exist today. Additionally, its unique design and technology is purpose-built to solve today's environmental problems in the world's food supply chain. Founded by a team with previous startup success and backed by top-tier VCs, we are committed to reducing waste, improving environmental impact, and reducing emissions with truly new technology. Our first commercial product launch went live in 2024, we deployed more in 2025 and are in line for even more in 2026. We can't do it alone -- we're seeking curious, capable, passionate team members motivated by the opportunity to create lasting impact on the world through their work. This role offers ample growth opportunities while working side-by-side with an impassioned, multi-disciplinary...
AE
Jan 24, 2026
Full time
Mechanical Engineer, Senior or Staff
$129,000 yearly
Antora Energy San Jose, CA
Antora builds and deploys thermal batteries to power always-on industrial operations with low-cost energy. Factory-built in the United States, Antora's modular thermal batteries deliver reliable heat and power, enabling industrial facilities of any size to decarbonize predictably and profitably. Antora is electrifying global industry while supporting U.S. manufacturing jobs, lowering costs for energy consumers, and enhancing the competitiveness of American industry. We are growing our company with people who put team and mission first, value connection through laughter and joy, and build with humility and openness. We are committed to continue building a diverse, passionate, and creative team dedicated to a future where every industrial facility, everywhere on earth, is powered by abundant, clean, low-cost energy. Position Summary We are seeking a self-driven and passionate Senior or Staff Mechanical Engineer to join our Product Development Team. In this role, you will own...
Pi
Apr 25, 2026
Full time
Staff Electro-Mechanical Engineer
Pivotal Palo Alto, CA
Pivotal is the leader in the emerging market of electric Vertical Takeoff and Landing (eVTOL) aircraft. We design, develop, and manufacture light eVTOL aircraft and are renowned for the BlackFly aircraft the world's first light eVTOL to fly manned missions and enter the consumer market. Efficient, compact, and simple, Pivotal aircraft are designed for a wide range of consumer, public service, and defense applications. Our distinctive tilt-aircraft architecture and scalable platform have been flying for over 10 years. Last year we announced our next-generation aircraft, the Helix, which is rapidly progressing toward general release and scalable production in early 2026. Mobility is one of the most highly-valued areas of modern technology investments. This is the right company, in the right space, the right strategy, at the right time. If you are ready for adventure, we invite you to join our amazing team and grow with us. The Aeromechanical team at Pivotal is seeking a highly...
Ri
Apr 21, 2026
Full time
Staff Mechanical Design Engineer, Power Electronics
$137,800 - $172,520 yearly
Rivian Carson, CA
About Rivian Rivian is on a mission to keep the world adventurous forever. This goes for the emissions-free Electric Adventure Vehicles we build, and the curious, courageous souls we seek to attract. As a company, we constantly challenge what's possible, never simply accepting what has always been done. We reframe old problems, seek new solutions and operate comfortably in areas that are unknown. Our backgrounds are diverse, but our team shares a love of the outdoors and a desire to protect it for future generations. Role Summary In this position, you will be developing electrical vehicle products directly related to high voltage and low voltage electronics from the concept to production launch. During the development and launch phases, you will be working with multiple cross functional teams, suppliers, and production integrators. The position requires to travel to Rivian plant(s) to support the production launch and ramp-ups, and will report directly to the Director of...
Ri
Apr 08, 2026
Full time
Staff Mechanical Engineer - Seat Complete
$137,800 - $172,300 yearly
Rivian Irvine, CA
About Rivian Rivian is on a mission to keep the world adventurous forever. This goes for the emissions-free Electric Adventure Vehicles we build, and the curious, courageous souls we seek to attract. As a company, we constantly challenge what's possible, never simply accepting what has always been done. We reframe old problems, seek new solutions and operate comfortably in areas that are unknown. Our backgrounds are diverse, but our team shares a love of the outdoors and a desire to protect it for future generations. Role Summary As a member of Rivian's Seat team within the Interior Engineering department, you will play a key role in shaping innovation and impactful products from concept through volume production. Your contributions will help drive the development of high-performing and sustainable solutions, fostering a culture of trust and continuous improvement within our collaborative Interior Engineering environment. Responsibilities • Design and develop seat...
FR
Apr 04, 2026
Full time
Staff Mechanical Engineer, Suspension (Autonomous Vehicle Team)
$175,000 - $210,000 yearly
Foundation Robotics San Francisco, CA
About Foundation: Foundation is developing the future of general purpose robotics andelectric mobilitywith the goal to save lives and augment human labor. Our mission is to create an autonomous, crewless ATV built to be truly all-terrain. Designed for commercial and defense use, it can save lives and take on heavy transport across mining, agriculture, construction, and more. We are on the lookout for extraordinary engineers and scientists to join our team. Your previous experience in robotics isn't a prerequisite - it's your talent and determination that truly count. We expect that many of our team members will bring diverse perspectives from various industries and fields. We are looking for individuals with a proven record of exceptional ability and a history of creating things that work. Our Culture: We like to be frank and honest about who we are, so that people can decide for themselves if this is a culture they resonate with. Please read more about our culture...
TA
Mar 30, 2026
Full time
Mechanical Engineer, Missile Defense (Senior-Staff)
True Anomaly Long Beach, CA
A new space race has begun. True Anomaly seeks those with the talent and ambition to build innovative technology that solves the next generation of engineering, manufacturing, and operational challenges for space security and sustainability. OUR MISSION The peaceful use of space is essential for continued prosperity on Earth-from communications and finance to navigation and logistics. True Anomaly builds innovative technology at the intersection of spacecraft, software, and AI to enhance the capabilities of the U.S., its allies, and commercial partners. We safeguard global security by ensuring space access and sustainability for all. OUR VALUES Be the offset. We create asymmetric advantages with creativity and ingenuity What would it take? We challenge assumptions to deliver ambitious results It's the people. Our team is our competitive advantage and we are better together YOUR MISSION The next generation of missile defense demands hardware that performs flawlessly at...
IP
Jan 30, 2026
Full time
Senior/Staff Mechanical Engineer, Robotics, San Jose (Onsite Only)
$150.00 - $250.00 hourly
IntelliPro Group Inc. San Jose, CA
Job Title: Mechanical Engineer, Robotics, San Jose Position Type: Full-time Location: San Jose, CA Base Salary: $150-250 (USD) Job ID#: 163825 Responsibilities: Design complex mechanical components and assemblies using 3D CAD software Develop, test, and validate prototypes to verify design concepts and functionality Create detailed engineering drawings Perform engineering analysis (FEA, MATLAB) to optimize designs for strength, weight, and durability Collaborate with cross-functional teams (electrical, software, systems) to integrate mechanical components Work with manufacturing partners to ensure designs are manufacturable and meet quality standards Build and test mechanical assemblies, fixtures, and test equipment Document designs, test procedures, and design processes thoroughly Requirements: Bachelor's or Master's degree in Mechanical Engineering, Robotics, Mechatronics, or related field 3+ years of industrial experience in mechanical design and...
MN
Apr 26, 2026
Full time
Electrical Engineer - Mid Level
Moffatt & Nichol Engine Long Beach, CA
Moffatt & Nichol is actively searching for an Electrical Engineer with a specialty in power systems to join our Mechanical, Electrical, and Instrumentation (MEI) team in either our Long Beach or Costa Mesa offices. The successful Electrical Engineer will work on both large and small projects locally, domestically and internationally. Projects include: ports, cargo terminals, shipyards, large and small marinas, port authority, and municipal. We are looking forward to mentoring and developing your skills in the growing horizontal / infrastructure market. You will work with an international MEI team and Senior Engineers around the company through our intraoffice staff utilization program. Thus, growing your skills beyond the state and country for which you work. You will support projects both on the job site as well as in the office. About Moffatt & Nichol: Moffatt & Nichol is a leading U.S.-based global infrastructure advisor specializing in the planning and design...
LL
Apr 26, 2026
Full time
Nuclear Facility Senior Electrical Project Engineer
$9,775 monthly
LLNL Livermore, CA
Company Description Join us and make YOUR mark on the World! Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability. Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact. Job Description We have an opening for a Nuclear Facility Senior Electrical Project Engineer to provide engineering support for new construction, upgrades to electrical facility systems, and modifications to laboratory facilities. You will participate in new and ongoing projects with technical responsibilities including design, development, fabrication, integration, testing and fielding of...
AS
Apr 25, 2026
Full time
Assistant Operations Engineer (36.26)
$84,289 - $118,003 yearly
American States Water Company Santa Fe Springs, CA
Golden State Water Company is one of the largest investor-owned water utilities in the United States. We deliver quality, reliable water to more than 1 million people in over 80 communities throughout California. Golden State Water has been in business for more than 90 years because we put customers first. POSITION DEFINITION Under the direction of the Operations Engineer, the Assistant Operations Engineer provides technical assistance and support with a primary focus on resolving operational problems and optimizing the efficiency of water system operations. Assists with implementation of the water loss control program, including water audits and related water loss activities. Responsible for the collection, organization, archiving and distribution of engineering and operations records including system maps, production statistics, and fire flow records. Essential Duties and Responsibilities: • Prepares and/or updates system wide and plant specific operational memos including...
NI
Apr 25, 2026
Full time
Senior Fire Protection Engineering Supervisor
Northern Impact San Francisco, CA
Overview A leading national architecture and engineering practice is seeking a Senior Fire Protection Engineering Supervisor to lead and expand its West Coast fire protection group. This role offers the opportunity to guide the direction of fire protection work across a broad portfolio of technically complex, mission-driven projects. The supervisor will oversee the development of fire alarm, suppression, and life safety strategies; manage and mentor a small team of engineers; and serve as the primary fire protection voice within multidisciplinary project teams. The ideal candidate is equally comfortable in a hands-on technical role and a visible leadership position, with an interest in growing a regional practice. Firm Overview With 12 offices across the nation, their portfolio includes the design of healthcare facilities, corporate headquarters, labs, museums, local, state, and federal government facilities, higher education buildings and campuses, and infrastructure...
ES
Apr 25, 2026
Full time
Staff Manufacturing Engineer
Element Science Redwood City, CA
Element Science, Inc. is a medical device and digital health company redefining how patients with heart disease are monitored and treated as they transition from the hospital to the home. Our mission is to improve outcomes for patients at risk of life-threatening cardiac events through innovative solutions at the intersection of clinical-grade wearables, advanced algorithms, and therapy delivery. We are entering an exciting phase of growth as we move from development into early commercialization. Our approach combines hardware, software, and services to deliver a more personalized and seamless patient experience-designed with both patients and clinicians in mind. Our product, a wearable patch defibrillator, is designed for patients with a temporary elevated risk of sudden cardiac arrest, addressing a significant and underserved population of over 500,000 patients in the U.S. By focusing on comfort, usability, and clinical effectiveness, we aim to transform the standard of care...
MT
Apr 25, 2026
Full time
Equipment Engineer
MasTec Inc Benicia, CA
Overview We are currently hiring for a full-time Equipment Engineer in our Benicia, CA office. This role requires a blend of technical expertise and, sometimes, specialized training or certification. American Civil Constructors West Coast, MasTec's Clean Energy & Infrastructure (CE&I) segment established in 1987, is a Heavy Civil Construction company. We are qualified to bid and perform work for State DOT's and City & County Public Works agencies all over the United States. Company Overview MasTec's Clean Energy & Infrastructure (CE&I) segment generates more than $4.5 billion in annual revenue, providing construction services across our operating groups: Renewables, Industrial, Infrastructure and General Building. Our Renewables expertise includes solar, wind, energy storage, aftermarket services, substations and switchyards. Our Industrial expertise includes manufacturing, mining and mineral processing, power plants, conventional power generation,...
EN
Apr 25, 2026
Full time
Retro Commissioning Engineer II
$111,771 - $149,204 yearly
ENFRA LLC Los Angeles, CA
About Us At ENFRA, we blend a rich history with a forward-looking vision. With over 100 years of experience, we are a pillar of stability in the energy infrastructure industry and a leader in innovative energy solutions. Our commitment to leveraging emerging technologies ensures that we remain at the forefront of the Energy-as-a-Service sector. We believe in growth-not just for our business, but for our people. Our team members have the opportunity to advance their careers in a supportive environment that values continuous learning and development. We embrace innovation and encourage creative problem solving to tackle the energy infrastructure and energy challenges of tomorrow. Inclusion is at the heart of our culture. We strive to create a workplace where every voice is heard and valued, fostering a collaborative environment where diverse perspectives drive our success. Join us to be part of a legacy of excellence and a future of groundbreaking advancements. At ENFRA,...
JA
Apr 24, 2026
Full time
Staff Electrical Engineer - System Test
$168,000 - $232,000 yearly
Joby Aviation Santa Cruz, CA
Company Overview Imagine a piloted air taxi that takes off vertically, then quietly carries you and your fellow passengers over the congested city streets below, enabling you to spend more time with the people and places that matter most. At Joby, we've been working to make that dream a reality since 2009 and we're now in the final stages of certifying our aircraft with the FAA. With plans to launch our aircraft in the US and Dubai, we're now scaling manufacturing and preparing for the launch of our commercial service. Overview Joby Aviation is seeking a highly organized, passionate individual to join our testing team. As part of this team you will help design hardware to support testing of flight critical systems for VTOL electric aircraft. Work may include electrical and industrial process equipment design, with a focus integrated loading systems. The role will involve a mix of hands-on prototyping and troubleshooting, documentation aligned to industry standards and the...
Co
Apr 22, 2026
Full time
Associate Engineer
City of Norwalk, CA Norwalk, CA
Salary : $107,268.00 - $139,452.00 Annually Location : City Hall 12700 Norwalk Blvd., CA Job Type: Full-Time (General Unit) Job Number: 26-75JS/CE Department: Public Services Opening Date: 04/15/2026 Closing Date: 5/4/2026 6:00 PM Pacific The City of Norwalk seeks a motivated Associate Engineer to join its Public Services Department. The Associate Engineer will be responsible for performing a variety of challenging and complex professional office and field engineering work under direction. This includes supporting the City's engineering services and activities, such as designing, evaluating, and constructing streets, drainage systems, water and wastewater treatment facilities, airports, and related capital improvement projects. The role also involves reviewing work prepared by outside consultants and overseeing and participating in the review of engineering reports, drawings, specifications, and calculations for buildings, structures, streets, sewers, and other public...
Ca
Apr 22, 2026
Full time
Junior Engineer (Mechanical) [5201] - Citywide (C00450)
City and County of San Francisco San Francisco, CA
Company Description THIS IS A CITYWIDE EXAM POSTING . Your application to this posting is an application to take a citywide exam. If you pass the exam, you will be emailed your score and ranking on the eligible candidate list. When a department has an open position with this job classification they will use this eligible list to hire for that position. Departments will contact candidates from this list to gauge interest in their specific roles. Learn more about the City's hiring process here: https://careers.sf.gov/knowledge/process/ Application Opening: April 21, 2026 Application Filing Deadline: May 11, 2026 at 11:59 PM Annual Salary: $ 113,282 to 137,670 San Francisco is a vibrant and dynamic city, on the forefront of economic growth & innovation, urban development, arts & entertainment, as well as social issues & change. This rich tapestry of culture and ideas is sustained by our City's commitment to heighten the quality of life for the diverse...
Ca
Apr 22, 2026
Full time
Junior Engineer (Civil) [5201] - Citywide (C00447)
City and County of San Francisco San Francisco, CA
Company Description THIS IS A CITYWIDE EXAM POSTING. Your application to this posting is an application to take a citywide exam. If you pass the exam, you will be emailed your score and ranking on the eligible candidate list. When a department has an open position with this job classification they will use this eligible list to hire for that position. Departments will contact candidates from this list to gauge interest in their specific roles. Learn more about the City's hiring process here: https://careers.sf.gov/knowledge/process/ Application Opening: April 21, 2026 Application Filing Deadline: May 11, 2026 at 11:59 PM Annual Salary: $ 113,282 to 137,670 San Francisco is a vibrant and dynamic city, on the forefront of economic growth & innovation, urban development, arts & entertainment, as well as social issues & change. This rich tapestry of culture and ideas is sustained by our City's commitment to heighten the quality of life for the diverse...
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