J-1 Visa Mechanical Engineering Intern Jobs
Mechanical Engineering Intern positions in the United States are available to current students and recent graduates through the J-1 Intern program category, which requires sponsorship from a U.S. Department of State-designated organization. Your host employer provides the training; a designated sponsor issues your DS-2019 and manages compliance.
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Get Access To All JobsAt d-Matrix, we are focused on unleashing the potential of generative AI to power the transformation of technology. We are at the forefront of software and hardware innovation, pushing the boundaries of what is possible. Our culture is one of respect and collaboration.
We value humility and believe in direct communication. Our team is inclusive, and our differing perspectives allow for better solutions. We are seeking individuals passionate about tackling challenges and are driven by execution. Ready to come find your playground? Together, we can help shape the endless possibilities of AI.
Summer 2026 Intern – Thermal & Mechanical Engineering
Location: Santa Clara, CA (On-site)
Team: Hardware Engineering / Systems Architecture
Dates: June 2nd - August 21st or June 22nd - September 11th
About the Role
At d-matrix, we are pushing the boundaries of AI compute efficiency. High-performance AI silicon generates significant heat, and our mission is to ensure our platforms remain cool and reliable under the most intense LLM inference workloads.
As a Thermal & Mechanical Engineering Intern, you will play a hands-on role in the physical realization of our hardware. You will transition between the CAD environment and the R&D lab, helping us build the infrastructure required to validate our next-generation liquid and air-cooled systems.
Key Responsibilities
- Lab Infrastructure & Setup: Assist in the foundational setup of the Thermal and Mechanical R&D lab. This includes organizing high-power test benches and installing specialized sensing equipment.
- Hardware Validation: Figure out and document the procedures to power and run PCIe accelerator cards in a standalone environment for thermal stress testing.
- Wind Tunnel Testing: Execute rigorous aerodynamic characterization using a wind tunnel. You will measure pressure drop and thermal performance across multiple PCIe cards to generate a high-fidelity statistical dataset for our architecture team.
- Thermal Modeling: Support the development of CFD (Computational Fluid Dynamics) models. Using Simcenter Flotherm, you will create detailed models of individual components (ASICs, VRMs, Optics) and full-system airflow profiles.
- Test Engineering: Prepare laboratory test setups and prepare test samples (including thermocouple attachment and TIM application) for thermal characterization.
- Documentation: Create "Gold Standard" documentation for laboratory procedures and maintain meticulous records of all experimental test data.
Required Qualifications
- Education: Currently pursuing a BS, MS, or PhD in Mechanical Engineering or a related field.
- CFD Foundations: Exposure to thermal simulation software (ideally Flotherm, Icepak, or SolidWorks Flow Simulation).
- Hands-on Aptitude: Comfort working with lab equipment, including thermal data loggers (DAQs), flow sensors, and high-power lab supplies.
- Analytical Mindset: Ability to take raw lab data and perform statistical analysis to identify performance trends and marginalities.
- Attention to Detail: Precision in laboratory work—from the exact placement of a thermocouple to the version control of a simulation model.
Preferred Skills
- Understanding of PCIe form factors and data center cooling requirements.
- Experience with 3D CAD modeling (SolidWorks, Pro/E, or NX).
- Familiarity with heat sink design and Thermal Interface Materials (TIM).
What You Will Gain
- End-to-End Experience: See a thermal design move from a Flotherm model to a physical wind tunnel test.
- Industry Impact: Contribute directly to the thermal integrity of hardware that will power the next generation of LLMs.
- Mentorship: Work side-by-side with senior hardware designers and architects who have built world-class systems at scale.
Equal Opportunity Employment Policy
d-Matrix is proud to be an equal opportunity workplace and affirmative action employer. We’re committed to fostering an inclusive environment where everyone feels welcomed and empowered to do their best work. We hire the best talent for our teams, regardless of race, religion, color, age, disability, sex, gender identity, sexual orientation, ancestry, genetic information, marital status, national origin, political affiliation, or veteran status. Our focus is on hiring teammates with humble expertise, kindness, dedication and a willingness to embrace challenges and learn together every day.
d-Matrix does not accept resumes or candidate submissions from external agencies. We appreciate the interest and effort of recruitment firms, but we kindly request that individuals interested in opportunities with d-Matrix apply directly through our official channels. This approach allows us to streamline our hiring processes and maintain a consistent and fair evaluation of all applicants. Thank you for your understanding and cooperation.
At d-Matrix, we are focused on unleashing the potential of generative AI to power the transformation of technology. We are at the forefront of software and hardware innovation, pushing the boundaries of what is possible. Our culture is one of respect and collaboration.
We value humility and believe in direct communication. Our team is inclusive, and our differing perspectives allow for better solutions. We are seeking individuals passionate about tackling challenges and are driven by execution. Ready to come find your playground? Together, we can help shape the endless possibilities of AI.
Summer 2026 Intern – Thermal & Mechanical Engineering
Location: Santa Clara, CA (On-site)
Team: Hardware Engineering / Systems Architecture
Dates: June 2nd - August 21st or June 22nd - September 11th
About the Role
At d-matrix, we are pushing the boundaries of AI compute efficiency. High-performance AI silicon generates significant heat, and our mission is to ensure our platforms remain cool and reliable under the most intense LLM inference workloads.
As a Thermal & Mechanical Engineering Intern, you will play a hands-on role in the physical realization of our hardware. You will transition between the CAD environment and the R&D lab, helping us build the infrastructure required to validate our next-generation liquid and air-cooled systems.
Key Responsibilities
- Lab Infrastructure & Setup: Assist in the foundational setup of the Thermal and Mechanical R&D lab. This includes organizing high-power test benches and installing specialized sensing equipment.
- Hardware Validation: Figure out and document the procedures to power and run PCIe accelerator cards in a standalone environment for thermal stress testing.
- Wind Tunnel Testing: Execute rigorous aerodynamic characterization using a wind tunnel. You will measure pressure drop and thermal performance across multiple PCIe cards to generate a high-fidelity statistical dataset for our architecture team.
- Thermal Modeling: Support the development of CFD (Computational Fluid Dynamics) models. Using Simcenter Flotherm, you will create detailed models of individual components (ASICs, VRMs, Optics) and full-system airflow profiles.
- Test Engineering: Prepare laboratory test setups and prepare test samples (including thermocouple attachment and TIM application) for thermal characterization.
- Documentation: Create "Gold Standard" documentation for laboratory procedures and maintain meticulous records of all experimental test data.
Required Qualifications
- Education: Currently pursuing a BS, MS, or PhD in Mechanical Engineering or a related field.
- CFD Foundations: Exposure to thermal simulation software (ideally Flotherm, Icepak, or SolidWorks Flow Simulation).
- Hands-on Aptitude: Comfort working with lab equipment, including thermal data loggers (DAQs), flow sensors, and high-power lab supplies.
- Analytical Mindset: Ability to take raw lab data and perform statistical analysis to identify performance trends and marginalities.
- Attention to Detail: Precision in laboratory work—from the exact placement of a thermocouple to the version control of a simulation model.
Preferred Skills
- Understanding of PCIe form factors and data center cooling requirements.
- Experience with 3D CAD modeling (SolidWorks, Pro/E, or NX).
- Familiarity with heat sink design and Thermal Interface Materials (TIM).
What You Will Gain
- End-to-End Experience: See a thermal design move from a Flotherm model to a physical wind tunnel test.
- Industry Impact: Contribute directly to the thermal integrity of hardware that will power the next generation of LLMs.
- Mentorship: Work side-by-side with senior hardware designers and architects who have built world-class systems at scale.
Equal Opportunity Employment Policy
d-Matrix is proud to be an equal opportunity workplace and affirmative action employer. We’re committed to fostering an inclusive environment where everyone feels welcomed and empowered to do their best work. We hire the best talent for our teams, regardless of race, religion, color, age, disability, sex, gender identity, sexual orientation, ancestry, genetic information, marital status, national origin, political affiliation, or veteran status. Our focus is on hiring teammates with humble expertise, kindness, dedication and a willingness to embrace challenges and learn together every day.
d-Matrix does not accept resumes or candidate submissions from external agencies. We appreciate the interest and effort of recruitment firms, but we kindly request that individuals interested in opportunities with d-Matrix apply directly through our official channels. This approach allows us to streamline our hiring processes and maintain a consistent and fair evaluation of all applicants. Thank you for your understanding and cooperation.
See all 268+ Mechanical Engineering Intern jobs
Sign up for free to unlock all listings, filter by visa type, and get alerts for new Mechanical Engineering Intern roles.
Get Access To All JobsTips for Finding J-1 Visa Sponsorship as a Mechanical Engineering Intern
Build a training plan before applying
Designated sponsors require a detailed training plan matching your mechanical engineering coursework to your internship tasks. Document specific skills you'll practice, the equipment you'll use, and measurable learning outcomes before you approach any host employer.
Confirm your degree-program enrollment status
The J-1 Intern category requires you to be currently enrolled in or graduated within 12 months from a post-secondary degree program. Gather your enrollment verification or transcripts early, since sponsors verify academic standing before issuing a DS-2019.
Target host employers with existing sponsor relationships
Many host employers already work with a designated sponsor and know the DS-2019 process. Use Migrate Mate to find U.S. mechanical engineering employers that have hosted J-1 interns before, which significantly shortens the compliance paperwork timeline.
Check whether your role triggers the home-country requirement
J-1 exchange visitors in government-funded or skills-list categories must return home for two years before changing status or applying for certain visas. Confirm with your designated sponsor whether your specific mechanical engineering internship triggers the two-year home-residency requirement.
Align your offer letter with DOL wage standards
Your host employer's offer must meet prevailing wage levels for the internship location and role. Cross-check the offered compensation against OFLC Wage Search data for mechanical engineering interns before signing, so you don't discover a shortfall during sponsor review.
Understand the 18-month program duration ceiling
J-1 Intern programs cap out at 18 months total, including any extensions. Clarify with your designated sponsor upfront how long the training plan runs, because the DS-2019 end date must align with your actual project timeline and your enrollment status.
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Find Mechanical Engineering Intern JobsMechanical Engineering Intern J-1 Visa: Frequently Asked Questions
Which J-1 program category applies to mechanical engineering interns?
Current students and graduates within 12 months of completing a mechanical engineering degree use the J-1 Intern category. Early-career professionals who already hold a degree and have relevant work experience but are not currently enrolled may qualify instead for the J-1 Trainee category. The distinction matters because each category has different duration limits and eligibility rules.
Who actually sponsors the J-1 visa for a mechanical engineering internship?
Your visa sponsor is not your host employer. A U.S. Department of State-designated organization, such as IIE, CIEE, Cultural Vistas, or AIPT, issues your DS-2019 form and manages compliance with exchange visitor regulations. The host employer where you perform engineering tasks is considered the training site, not the visa sponsor.
How do I find host employers that will support J-1 mechanical engineering internships?
Search on Migrate Mate for mechanical engineering internship roles at U.S. companies that have experience hosting J-1 exchange visitors. Employers already familiar with the DS-2019 process and training plan requirements move faster through sponsor approval, which reduces the gap between your offer letter and your program start date.
What does the training plan for a mechanical engineering J-1 internship need to include?
Designated sponsors require a structured Training/Internship Placement Plan, often called a DS-7002, that lists specific engineering competencies you'll develop, the supervision structure, equipment or software you'll use, and weekly or phase-based learning objectives. Generic job descriptions are routinely rejected. The plan must directly link your academic background to the internship activities.
Does a J-1 mechanical engineering internship carry the two-year home-residency requirement?
It depends on your funding source and your home country's skills list. J-1 participants whose internship is funded by a government agency or who come from a country with designated critical skills in engineering may be subject to the INA Section 212(e) two-year home-country physical presence requirement. Your designated sponsor must advise you on this before your DS-2019 is issued.
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