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48 mechanical design engineering intern jobs found

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Intern mechanical design engineering intern California
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AE
Mar 12, 2026
Intern
Mechanical Engineering Intern
Antora Energy San Jose, CA, USA
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. Position Summary Antora is seeking a highly-motivated Mechanical Design Engineering Intern to join our mission-driven team within the Mechanical Design Engineering organization (spanning...
1T
Apr 11, 2026
Intern
Mechanical Engineering Internship, Prototyping
1X Technologies AS San Carlos, CA, USA
About 1X Since its founding in 2015, 1X has been at the forefront of developing advanced humanoid robots designed for household use. Our mission is to create an abundant supply of labor via safe, intelligent humanoids. We strive for excellence in all we do, solving some of the hardest problems in robotics with the world's most talented engineers and creatives. Every part of our robots is designed and produced in-house-from motor coils to AI,, reflecting our vertically integrated approach. At 1X, you'll own real projects, be recognized for your achievements, and rewarded based on merit. Role Overview This role will support hardware development for June-August 2026. You'll be part of the Prototyping team, responsible for development, assembly, and testing parts used in our humanoid robots. This is a hands-on, in-person role based in Palo Alto. For the right candidate, this internship may lead to a full-time offer. Mechanical-engineering focus 3D-print and assemble prototypes...
Ra
Apr 11, 2026
Intern
Manufacturing Engineering Intern (Summer 2026)
Ralliant Hollister, CA, USA
PacSci EMC, a Ralliant Operating Company, delivers innovative energetic material solutions that enable mission success across aerospace and defense. As part of our commitment to developing future talent, we are seeking a Manufacturing Intern for Summer 2026. In this role, you will gain hands-on experience in a fast-paced, highly regulated environment while supporting engineering and manufacturing initiatives. You will collaborate with engineers, technicians, and cross-functional teams on real-world projects that drive operational excellence, product quality, and continuous improvement. Key Responsibilities As a Manufacturing Intern, you will: Support the development and completion of compliance matrices. Assist in preparing and updating PFMEA documentation. Contribute to risk assessments for manufacturing processes. Participate in the design of tooling to support production. Conduct process development experiments and report findings. Actively participate in group...
Le
Apr 11, 2026
Intern
Electrical Engineer Intern/Co-op Summer 2026
$25.00 - $28.00 hourly
Legence Lafayette, CA, USA
CMTA, a Legence company CMTA is one of the fastest growing engineering firms in the U.S., with nationally recognized expertise in sustainable, high-performance building engineering. We are a collaborative, innovative, and energetic team that leverages a data-driven, holistic approach to consulting engineering, performance contracting, and zero energy projects. We focus on finding engineers whose skills and personalities drive them to excel, fostering a workplace that provides unparalleled growth and career opportunities. For college students interested in engineering design for the built environment, CMTA has a robust co-op program for students pursuing a degree in Mechanical Engineering, Electrical Engineering, and Architectural Engineering. We offer an opportunity for students to immerse themselves for one or more semesters in the consulting engineering world. Our co-ops build industry competitive skills in a hands-on environment, all while working on a team, and being trained...
EU
Apr 10, 2026
Intern
Intern - Mechanical Engineer
$22.00 hourly
Emcor UK Grover Beach, CA, USA
About Us We are a full-service HVAC, building automation, chiller, and retrofit contractor with a reputation for combining high-quality consulting services with customized energy solutions. Our integrated, single-source solutions include turnkey in-house capabilities with design assistance, as well as engineering applications and automated control systems. Job Summary The Mesa Internship Program is a summer rotational program for students seeking experience in energy, mechanical, building, service, sustainability, sales, or project management. Mesa Energy Systems, Inc. has an opening for an Engineering Intern. This position will provide drafting and engineering support to the Mesa Energy Systems Engineering Group. Interns will be responsible for providing drafting and engineering support to the Mesa Energy Systems Engineering Group. As assigned by management, the engineering intern's tasks may include, but are not limited to, job walks or site visits to gather information...
IP
Apr 09, 2026
Intern
Process Engineering Intern
Integrated Polymer Solutions San Diego, CA, USA
MAST is seeking a Process Engineering Intern who is an undergraduate student or recent graduate who will learn the inner workings of an engineering-oriented company that focuses on innovation in the Aerospace industry. STM specializes in the production of electrically conductive materials and textiles that services Aerospace, Defense (e.g. Lockheed Martin, Northrup Grumman), Medical, Telecommunications and many other industries. The Summer 2026 internship program will begin June 1st and run approximately 12-16 weeks, with anticipated end dates between August 28th and September 18th depending on availability. Interns will work 20-30 hours per week (minimum 20, maximum 30), Monday through Friday, with flexible scheduling. About MAST: MAST Technologies is an industry leader in advanced RF and EMI absorbing materials. We create engineered solutions that support mission-critical defense and aerospace applications worldwide. Our employees contribute directly to cutting-edge...
OA
Apr 07, 2026
Intern
Mechanical Engineer Intern [Propulsion]
Odys Aviation Long Beach, CA, USA
About Odys Our mission at Odys is simple - we build safe, sustainable aircraft to cut travel time in half on the world's busiest corridors. Our flagship aircraft Alta enables travelers to skip the big-airport hassle by using city helipads and local airports to connect cities less than 1,000 miles apart (approx 40% of flights). And on average cut CO2 by 76% on tens of billions of flight miles globally. To get there, we start with our UAV called Laila for commercial logistics, medical transport, humanitarian aid, disaster relief, and defense missions. We're deploying aircraft with launch partners (Fiji Airways, Honeywell, Aramex, US Navy) beginning in 2026 and already have firm orders for aircraft under contract. We're a team of expert engineers from deep tech and aerospace that focus on fast iterations loops (completed transition flight faster than our peers) combined with mastery of the aircraft certification process. Previously, our team developed custom drones, brought...
RC
Apr 06, 2026
Intern
Filtration Engineering Intern
$23.00 hourly
Repligen Corporation CA, USA
Repligen is seeking a Filtration Engineering Intern to support hands-on engineering work at our Rancho Dominguez location. This internship offers an opportunity to contribute to practical, self-contained engineering focused project deliverables with immediate business impact. The intern will work under the guidance of the Process Engineering Manager, to support manufacturing process development and continuous improvement initiatives. This role will apply engineering design principles, hands-on experimentation, and problem-solving techniques to improve process reliability, product quality, and efficiency on the manufacturing line. Make a global impact-join Repligen. We're united by a mission to inspire advances in bioprocessing as a preferred partner in the production of biologic drugs that improve human health worldwide. No matter your role or background, at Repligen, you will play a key part in shaping some of the most innovative and life-changing therapies in the world. We...
PA
Apr 04, 2026
Intern
Engineering Intern
PCX Aerosystems Long Beach, CA, USA
About the Organization Applied Aerospace & Defense (Applied) is a premier provider of advanced design, engineering, and vertically integrated manufacturing solutions for leading and next-generation space and defense technology companies. Applied builds complex hardware for extreme operating environments and is focused on three core markets: Space and Launch Systems, Defense Aviation and Airborne Systems, and C5ISR and Precision Strike Systems. With decades of space and defense manufacturing heritage, Applied combines deep material science and IP-enabled process expertise with the ability to enable rapid prototyping, enhance new product development, and responsively scale production. Across its nationwide infrastructure of advanced manufacturing facilities, Applied continuously supports a balanced mix of next-generation technology and platform development, large scale production programs, and aftermarket sustainment for enduring platforms. EOE Statement Applied Aerospace...
JA
Apr 03, 2026
Intern
Mechanical Design Engineer Intern, Structures
$22.00 - $31.00 hourly
Joby Aviation Santa Cruz, CA, USA
Overview Joby Aviation is seeking a passionate student to join our design engineering team for the summer. In this role, you will be responsible for the development & detailed design of structural airframe components. You will be deeply involved in everything from preliminary concept work to actual production. For this role, you will have a strong understanding of CAD design and the ability to do hand calculations and create detailed models and drawings. Further, you will work closely with many disciplines, including our electronics, wiring systems, structural analysis, and manufacturing teams. Responsibilities Understanding of static and structural hand-calculations Design of composite/metallic brackets to integrate electronics and other aircraft systems Perform initial layout and sizing Fastener sizing, bond area sizing, riveting Composite <-> metallic material compatibility, galvanic corrosion Detailed drawing creation, GD&T Direct communication with...
AM
Apr 02, 2026
Intern
Mechanical Engineer Intern
Analytical Mechanics Associates Mountain View, CA, USA
Job Description: AMA is accepting applications for two on-site summer internship positions at NASA Ames Research Center in Mountain View, CA. Work will be in support of the Entry Systems and Vehicle Development Branch at NASA. The successful candidates will play an important role in the direct application of technologies and capabilities to design, develop, test, and prototype atmospheric Entry, Descent, and Landing (EDL) systems. Responsibilities: NASA ARC is seeking support for thermal protection and entry systems projects, including ADEPT (Adaptable Deployable Entry and Placement Technology): • Development and analysis of ADEPT aeroshell deployment mechanisms • Design and prototyping of drag modulated entry drag skirt release mechanisms • Development of mass estimation tools for entry system components • Mechanical design and analysis for spaceflight hardware development • CAD modeling and documentation of flight hardware designs • Investigation and design of...
IP
Apr 02, 2026
Intern
Automation Engineering Intern
Integrated Polymer Solutions Lake Forest, CA, USA
This position will support the sustainment and development of Bal Seal Engineering's automated production and inspection equipment. The position requires a "Hands On" approach that will involve actively managing day to day production equipment issues, support of continuous improvement initiatives along with projects focused on machine upgrades, and new machine development. Candidates must have excellent communication skills, good problem-solving capabilities and the ability to work collaboratively across the organization. About Bal Seal: Bal Seal Engineering delivers advanced sealing, connecting, and contact solutions that serve medical, aerospace, energy, and industrial markets. Our proprietary spring-energized seals and electrical contacts help customers achieve precision, efficiency, and reliability. Employees thrive in a culture that values craftsmanship, technical mastery, and close partnership with customers solving complex challenges Essential Duties and...
AS
Apr 01, 2026
Intern
Electrical Engineering Intern - Fall
Atomic Semi San Francisco, CA, USA
About Atomic Semi Atomic Semi is building a small, fast semiconductor fab. It's already possible to build this with today's technology and a few simplifications. We'll build the tools ourselves so we can quickly iterate and improve. We're building a small team of exceptional, hands-on engineers to make this happen. Mechanical, electrical, hardware, computer, and process. We'll own the stack from atoms to architecture. Our team is optimistic about the future and we want to continue pushing the limits of technology. Smaller is better. Faster is better. Building it ourselves is better. We believe our team and lab can build anything. We've set up 3D printers, a wide array of microscopes, e-beam writers, general fabrication equipment - and whatever is missing, we'll just invent along the way. Atomic was founded by Sam Zeloof and Jim Keller. Sam is best known for making chips in his garage, and Jim has been a leader in the semiconductor industry for the past 40 years. About the...
AS
Apr 01, 2026
Intern
Mechanical Engineering Intern - Fall
Atomic Semi San Francisco, CA, USA
About Atomic Semi Atomic Semi is building a small, fast semiconductor fab. It's already possible to build this with today's technology and a few simplifications. We'll build the tools ourselves so we can quickly iterate and improve. We're building a small team of exceptional, hands-on engineers to make this happen. Mechanical, electrical, hardware, computer, and process. We'll own the stack from atoms to architecture. Our team is optimistic about the future and we want to continue pushing the limits of technology. Smaller is better. Faster is better. Building it ourselves is better. We believe our team and lab can build anything. We've set up 3D printers, a wide array of microscopes, e-beam writers, general fabrication equipment - and whatever is missing, we'll just invent along the way. Atomic was founded by Sam Zeloof and Jim Keller. Sam is best known for making chips in his garage, and Jim has been a leader in the semiconductor industry for the past 40 years. About the...
Ve
Mar 29, 2026
Intern
Co-op - Product Design Engineering
Vesync Tustin, CA, USA
The Company: VeSync is a portfolio company with brands that cover different categories of health & wellness products. We wouldn't be surprised if you have one of our Levoit air purifiers in your living room or a COSORI air fryer whipping up healthy and delicious meals for you every night. We're a young and energetic company, we've had tremendous success, and we are constantly growing our team. As we garner more industry attention - just check out our accomplishments and awards by CES Innovation, iF Design, IGA, and Red Dot - we also need driven and talented people to join our team. That brings us to you, and what you'll be joining. Our teams are smart and diligent and take ownership of their work - they're confident in their work but know how to collaborate with open ears and a spirit of learning. If you're down-to-earth, approachable, and easy to strike up a conversation with, this may be a great fit for you. Check out our brands: levoit.com | cosori.com |...
BI
Mar 27, 2026
Intern
Intern Engineering SO
$20.00 hourly
Bourns, Inc. Riverside, CA, USA
SUMMARY OF POSITION: Under close supervision, performs engineering-related assignments as part of a cross-functional team. This may include learning and using various instruments and different software to assist engineers and designers on tests related to the design, performance, or failure of company products. SPECIFIC DUTIES: 1. As appropriate, learn to use Instron machine, CRV/noise tester, or other electrical/mechanical testers to assist engineers and designers in project tasks. 2. Work with engineering and marketing to learn the specifics of component design, manufacturing and marketing. 3. Assist engineers and test lab personnel in testing required for development and proof of design integrity. 4. Learn to analyze test results and makes charts/graphs out of testing data. 5. Assist engineers in the preparation of specifications, estimates or reports needed to manage a program through development. 6. Assist in maintaining engineering records. 7. Assist in ongoing division...
EU
Mar 27, 2026
Intern
Intern - Mechanical Engineer
$22.00 hourly
Emcor UK San Leandro, CA, USA
About Us We are a full-service HVAC, building automation, chiller, and retrofit contractor with a reputation for combining high-quality consulting services with customized energy solutions. Our integrated, single-source solutions include turnkey in-house capabilities with design assistance, as well as engineering applications and automated control systems. Job Summary The Mesa Internship Program is a summer rotational program for students seeking experience in energy, mechanical, building, service, sustainability, sales, or project management. Mesa Energy Systems, Inc. has an opening for an Engineering Intern. This position will provide drafting and engineering support to the Mesa Energy Systems Engineering Group. Interns will be responsible for providing drafting and engineering support to the Mesa Energy Systems Engineering Group. As assigned by management, the engineering intern's tasks may include, but are not limited to, job walks or site visits to gather information...
KS
Mar 27, 2026
Intern
Intern, Mechanical Engineering
Kulicke & Soffa Santa Ana, CA, USA
Job Description Working with various Engineers on ME team, intern will assist in completing tasks. Assembly and testing new designs and/or commercial components along with data collection/reporting are the primary tasks. Analysis of results, test report writing and review will be required. Additional work with NX CAD to help design and detail parts used in assemblies may be required (no prior NX experience needed). Responsibilities See above Qualifications 3+ years of Mechanical Engineering college completion. Familiar with using a CAD program (Solidworks or AutoCAD or equivalent). Hands on skills, ability to put together mechanical assemblies, use measurement equipment and interest in mechanical assembies.
Im
Mar 26, 2026
Intern
Engineering Intern
Imerys Lompoc, CA, USA
The Company Imerys is the world's leading supplier of mineral-based specialty solutions for the industry with €3.4 billion in revenue and 12,300 employees in 40 countries in 2025. The Group offers high value-added and functional solutions to a wide range of industries and fast-growing markets such as solutions for the energy transition and sustainable construction, as well as natural solutions for consumer goods. Imerys draws on its understanding of applications, technological knowledge, and expertise in material science to deliver solutions which contribute essential properties to customers' products and their performance. As part of its commitment to responsible development, Imerys promotes environmentally friendly products and processes in addition to supporting its customers in their decarbonization efforts. Imerys is listed on Euronext Paris (France) with the ticker symbol NK.PA. The Position Engineering Intern Job Summary Intern - Summer 2026...
BI
Mar 22, 2026
Intern
Intern Engineering Senior
Bourns, Inc. Riverside, CA, USA
SUMMARY OF POSITION: Under close supervision, performs engineering-related assignments as part of a cross-functional team. This may include learning and using various instruments and different software to assist engineers and designers on tests related to the design, performance, or failure of company products. SPECIFIC DUTIES: 1. As appropriate, learn to use Instron machine, CRV/noise tester, or other electrical/mechanical testers to assist engineers and designers in project tasks. 2. Work with engineering and marketing to learn the specifics of component design, manufacturing and marketing. 3. Assist engineers and test lab personnel in testing required for development and proof of design integrity. 4. Learn to analyze test results and makes charts/graphs out of testing data. 5. Assist engineers in the preparation of specifications, estimates or reports needed to manage a program through development. 6. Assist in maintaining engineering records. 7. Assist in ongoing division...
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