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346 junior mechanical engineer jobs found

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PF
Mar 09, 2026
Full time
Senior Mechanical Engineer - Pulser Modules
$138,100 - $263,800 yearly
Pacific Fusion Fremont, CA, USA
About Pacific Fusion Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy. We are rapidly designing and building a pulsed magnetic fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems. Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders. Why This Role Matters Pacific Fusion is seeking an exceptional Senior Mechanical Engineer to help create the path to...
QE
Mar 05, 2026
Full time
Senior Opto-Mechanical Engineer - 065QE
Quartus Engineering San Diego, CA, USA
About Quartus Quartus Engineering Incorporated (www.quartus.com) is a leading provider of engineering services and integrated hardware solutions for a wide range of clients and industries. We employ advanced computer-aided engineering tools in the areas of optics, structural, thermal, and coupled analyses. We couple our engineering analysis capabilities with design, prototype, integration and test capabilities to create solutions for our clients that are of extraordinary value. About Applied Photonics Sector Applied Photonics is a business unit within Quartus that focuses on the practical application of the science and technology of light. Our teams develop innovative products as well as custom optical and metrology solutions for commercial and industrial applications. Our expertise spans precision metrology, robotics, machine vision, semiconductor and emerging photonic technologies including quantum optics. Typical development cycles begin with defining customer objectives,...
PF
Feb 16, 2026
Full time
Senior Mechanical Design Engineer - Positioning Systems
Pacific Fusion San Leandro, CA, USA
About Pacific Fusion Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy. We are rapidly designing and building a pulsed magnetic fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems. Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders. Why This Role Matters Pacific Fusion is seeking an exceptional Senior Mechanical Design Engineer to join our dynamic...
TS
Feb 13, 2026
Full time
Senior Mechanical Engineer
T2S Solutions Poway, CA, USA
Blue Marble Communications (a T2S company) is seeking a motivated individual to join our team as a Senior Mechanical Engineer . This role focuses on the design, analysis, integration, and test of complex electro-mechanical and opto-mechanical systems, including space-qualified flight hardware and ground support equipment. The ideal candidate brings deep technical expertise and strong problem-solving ability, capable of independently resolving complex design challenges and translating system requirements into robust, high-performance hardware solutions. Responsibilities Design of complex electro-mechanical and opto-mechanical systems, including ruggedized and precision hardware Drives design decisions with a strong balance of performance, risk, cost, and manufacturability considerations Owns the flow-down, implementation, and verification of requirements through design, analysis, test, and qualification Translates customer and system-level requirements into clear...
MQ
Feb 03, 2026
Full time
Senior Robotic Automation & Mechanical Design Engineer
Monarch Quantum San Diego, CA, USA
Join our fast-paced and passionate team as a Senior Robotic Automation & Mechanical Design Engineer. As we scale, you will be instrumental in building our foundation from the ground up. This is a dynamic, hands-on role for a self-starter who thrives in a fluid startup environment. You'll have the opportunity to work on cutting edge technologies, work closely with leadership, and develop and implement engineering practices that support our mission and growth. Your key responsibilities are as follows: Design pick-and-place systems that leverage machine vision for accurate position detection. Build expert-level cable management solutions for dynamic assemblies. Conduct thermal, structural, and vibration modeling for complex opto-mechanical assemblies and alignment systems. Employ and enhance automated fluid dispensing systems. Ensure adherence to best practices for serviceability and maintainability in designs. Develop optical alignment architectures for both coarse and...
AE
Jan 24, 2026
Full time
Mechanical Engineer, Senior or Staff
$129,000 yearly
Antora Energy San Jose, CA, USA
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...
TK
Jan 09, 2026
Full time
Senior Mechanical Engineer
$140,000 yearly
ThinKom Solutions, Inc Hawthorne, CA, USA
Job Summary: This position is focused on the mechanical design, development, and manufacturing of stationary and mobile antenna systems and related equipment. Essential Job Duties and Responsibilities: Work as part of multiple integrated product teams. In some cases, will be lead mechanical engineer on a team, while in others, will be in a support and/or advisory role Perform hands-on design and analysis, and mentor junior engineers Prepare and present design and analysis material during internal and customer design reviews Prepare detailed product manufacturing documentation such as test procedures and assembly instructions Support component and antenna system level environmental testing Interface with ThinKom production personnel and outside suppliers during manufacturing phase of programs Support business development activities by providing input for proposals Skills and/or Experience Needed: BS in Mechanical or Aerospace Engineering 5+ years of experience in the...
PF
Dec 25, 2025
Full time
Senior Mechanical Engineer
Pacific Fusion San Leandro, CA, USA
About Pacific Fusion Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy. We are rapidly designing and building a pulsed magnetic fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems. Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders. Why This Role Matters Pacific Fusion is seeking an exceptional Senior Mechanical Engineer to join our dynamic team...
PF
Dec 25, 2025
Full time
Senior Mechanical Engineer - Large Structures
Pacific Fusion Fremont, CA, USA
About Pacific Fusion Pacific Fusion was founded in 2023 with the mission to power the world with abundant, affordable, clean energy. We are rapidly designing and building a pulsed magnetic fusion system to achieve net facility gain (more fusion energy output than stored energy input). In parallel, we are developing the key components required to build affordable fusion systems. Our plans are ambitious. We have raised over $900M so far from incredible investors, resourcing us to deliver on these plans. We are bringing together the best scientists, engineers, and operators from the fusion community, hard tech industry, and other sectors. We are united by a shared sense of urgency to provide clean power for the world, particularly managing climate change while meeting growing global energy demand. You can read more about us in this letter from our founders. Why This Role Matters Pacific Fusion is seeking an exceptional Senior Mechanical Engineer to join our dynamic team...
Se
Dec 18, 2025
Full time
Senior Mechanical Engineer
Seasats San Diego, CA, USA
Role: Senior Mechanical Engineer Location: San Diego, CA Salary: $120,000 - $160,000 / yr + stock options, 401k matching, and other benefits Role Overview: Seasats deploys autonomous vehicles on multi-month missions that rely on top-quality mechanical systems. Our mechanical engineering team designs and builds these systems, providing customers with products they can count on. Our team has grown to keep pace with rapidly multiplying projects, and now we're looking to recruit a senior engineer. This person will remove bottlenecks and execute plans, work with mechanical and vehicle design leadership, and mentor and coach junior engineers. Role Details: Each person on this team has a lot of autonomy and responsibility. Some tasks will include: Designing parts and assemblies Working with junior engineers Assisting in timeline and plan creation Shaping design and organizational processes within the engineering team Reviewing, detailing, and configuration management of...
QE
Nov 12, 2025
Full time
Senior Opto-Mechanical Engineer, Semiconductor - 045QE
$114,609 - $187,270 yearly
Quartus Engineering Remote (San Diego, CA, USA)
About Quartus Quartus Engineering Incorporated (www.quartus.com) is a leading provider of engineering services and integrated hardware solutions for a wide range of clients and industries. We employ advanced computer-aided engineering tools in the areas of optics, structural, thermal, and coupled analyses. We couple our engineering analysis capabilities with design, prototype, integration and test capabilities to create solutions for our clients that are of extraordinary value. What will you do? As an Opto-Mechanical Senior Engineer in our Semiconductor sector, you will design and develop robust mechanics for high performance optical systems in challenging environments. You will work as part of a team of creative cross-disciplinary engineers to meet project and customer requirements and gain exposure to a wide variety of optical systems from non-contact optical metrology to industrial automation and everything in between. At Quartus, you will be involved in the entire project...
As
Aug 25, 2025
Full time
Senior Mechanical Engineer
$140,000 - $185,000 yearly
Astranis San Francisco, CA, USA
As a team, we've launched five satellites into orbit, signed ten commercial deals worth over $1 billion in revenue, raised over $750 million from top global investors, and recruited a team of over 400 world-class engineers. We all work out of our (legendary) San Francisco office, which was once used to build ships during the World Wars. Our satellites, which operate from geostationary orbit (GEO), weigh only 400 kg and utilize a proprietary software-defined radio payload. Each satellite can connect over two million people, and we're very excited for the impact we'll soon have in the Philippines, Mexico, and more! Backed by substantial funding and a passionate, collaborative team, we offer a rewarding work environment where you'll learn and make a significant impact, no matter where you are in your career. Senior Mechanical Engineer As an Astranis Senior Mechanical Engineer you will own the complete lifecycle of various subsystems on our spacecraft. Whether it is incremental...
3DEO
Oct 10, 2025
Full time
Senior Mechanical Engineer
$130,000 - $175,000 yearly
3DEO Torrance, CA, USA
Job Title: Senior Mechanical Engineer — Industrial Machine Design & Integration Department: R&D Reports to: Director of Engineering Employment Type: Full-Time FLSA Status: Exempt The Company: 3DEO is a leader and innovator in sinter-based additive manufacturing (AM), delivering proprietary and differentiated AM solutions that drive breakthrough product performance. With some of the industry’s highest-volume capabilities in metal 3D printing, 3DEO combines cutting-edge manufacturing with multi-disciplinary engineering and product development expertise. Our patented and award-winning technology has revolutionized how customers approach design, enabling high-volume production with unmatched quality, precision, and cost efficiency. Holding roughly 20 patents, 3DEO is more than a manufacturer – we are a trusted partner in solving complex challenges and unlocking the full potential of AM. At 3DEO, we collaborate closely with customers in...
Ar
Mar 18, 2026
Full time
Fire Protection Engineer - Los Angeles Area, California
$92,530 - $152,675 yearly
Arcadis Remote (Los Angeles, CA, USA)
Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets. We are more than 36,000 people, in over 70 countries, dedicated to improving quality of life. Everyone has an important role to play. With the power of many curious minds, together we can solve the world's most complex challenges and deliver more impact together Role description: We're looking for an experienced Fire Protection Engineer to support our US Places Design & Engineering business area in the Los Angeles, California area. You will work directly with other Fire Protection Engineers, Mechanical and/or Electrical Engineers, Architects, and clients on a range of facility design projects, including Federal projects You will lead the fire protection discipline of multiple and concurrent projects through the pursuit, proposal, design, and construction phases. Travel to project sites is required (approx. 1 week a month will be...
HE
Mar 18, 2026
Full time
RF Engineer III
HEICO Camarillo, CA, USA
Lucix Corporation, a subsidiary of HEICO's Electronic Technologies Group has steadily evolved to become the world leader in RF Active and Passive Units, Subsystems, and Assemblies, for Commercial, Civil and Defense Satellite Payloads. Lucix also provides RF hardware for Airborne and Ground Systems. All hardware is designed, qualified, manufactured, tested, and shipped from Lucix facilities in California, USA. We are seeking an experienced RF Engineer III to join our Engineering team. The RF Engineer III is a technical expert that will lead as a project engineer for RF products including Oscillators, Central Power Supply Units (CPSUs), Frequency Converters, and Amplifiers for our commercial space customers. Essential Duties and Responsibilities: Lead design and development of complex RF products with emphasis on oscillator products Analyze customer requirements and constraints Generate detailed design proposals for customers and provide expert-level advice on trade-off...
St
Mar 18, 2026
Full time
Senior Electrical Engineer, Industrial Buildings
$117,800 - $176,800 yearly
Stantec Irvine, CA, USA
Stantec's Buildings team is on a mission to become the world's leading integrated design practice. Our architects, engineers, interior designers, consultants, sustainability specialists, and technologists are passionate about the power of design. Our collaborative culture and our innovative, sustainable approach to projects help us create buildings that matter to our world. Together, we are enhancing the quality of life globally through design. Join us and design your place with Stantec. Your Opportunity The Senior Electrical Engineer candidate will apply building electrical engineering principles, your superior client service skills, and project management best practices to deliver projects that meet project requirements, exceed client expectations, and meet project financial and other objectives. Working within our thriving Industrial buildings practice, you will contribute to project delivery standards and work processes, provide quality control, workload forecasting,...
Co
Mar 18, 2026
Full time
Senior Facilities Engineer
$94,600 - $127,600 yearly
Cordis Irvine, CA, USA
Overview Selution, in partnership with Cordis, specializes in the development of ground-breaking technology and commercialization of advanced drug device combination products for the treatment of coronary and peripheral artery disease. Our mission is to revolutionize healthcare by creating next-generation solutions that address unmet and critical medical needs. Responsibilities The Senior Facilities Engineer leads and supports facility engineering projects with a focus on construction, infrastructure reliability, energy efficiency, and compliance with regulatory standards. This role involves managing complex engineering assignments, evaluating technical solutions, and ensuring facility systems operate effectively to support business needs. Key Responsibilities Provide engineering expertise in the design, operation, and maintenance of building systems (HVAC, ISO 8 Cleanrooms, compressed air/CDA, nitrogen generation system, electrical, plumbing, controls, and...
We
Mar 15, 2026
Full time
Senior Project Engineer
Webcor San Francisco, CA, USA
As a Senior Project Engineer, you'll be responsible for promoting site and office safety, and assist the Project Management team in the planning, coordinating, and administration of their assigned job to ensure the work is completed on time, within budget, while adhering to Webcor's quality standards. ESSENTIAL DUTIES AND RESPONSIBILITIES Promotes and adheres to safety best practices on the jobsite. Assists the Project Manager and team members in the planning, coordination, and administration of assigned projects/scopes of work. This includes areas such as RFI's, submittals, contracts, change orders, purchasing, scheduling, and progress reports. Assists in bidding and buyout activities such as scope delineation, scope letter development, bidder outreach, and bid leveling. Reviews field inspection reports and communicates deficiencies to supervisor and responsible Superintendent. Responsible for record drawings, including review and posting of document changes. Creates and...
RE
Mar 13, 2026
Full time
Engineer II-EPC
Rosendin Electric, Inc. CA, USA
Whether you're a recent grad or a seasoned professional, you can experience meaningful career growth at Rosendin. Enjoy a true sense of ownership as you work with a proven industry leader on some of the most exciting and high-profile projects in the nation. We offer a wide range of job opportunities, competitive compensation, full benefits, an Employee Stock Ownership Plan and more. Why Rosendin? Committed. Innovative. Engaged. If you're looking to take your career to the next level and work with some of the best and brightest in the industry, we want to hear from you. Since our founding over 100+ years ago, Rosendin has been driven to positively impact the communities where we live and work. We are an organization built on integrity and we have a culture that empowers people, embraces diversity, and inspires everyone to do their best. As one of the largest EMPLOYEE-OWNED electrical contractors in the United States, you will have the unique benefit of being a shareholder...
TM
Mar 12, 2026
Full time
Project Engineer
TriMas Corporation Simi Valley, CA, USA
Project Engineer 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 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's Peri-SealTM is one of themost sought after connectors in the aerospace industry. Additionally, RSAdesigns and produces flexible joints and hoses, ozone converters and manycomplex assemblies to meet stringent customer needs. JobSummary: As a direct report to the Engineering Director,the Project Engineer shall be responsible to plan, organize, implement andcontrol a variety of activities related...
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