R&D Mechanical Engineer Jobs
R&D Mechanical Engineer jobs are open across aerospace, medical devices, consumer electronics, and automotive manufacturing, from early-career to principal and staff engineer levels, with specializations in product development, thermal systems, and structural analysis. Find a role that fits below and apply directly.
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About Mainspring
Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities. Mainspring also partners with global energy leaders including AEP, NextEra Energy Resources, Schneider Electric, and more.
The core values that ground our work, guide our decisions, and connect us together:
- Pragmatic Optimism
- Excellence without Ego
- Proactive Collaboration
Job Overview
Responsibilities
- Dive headfirst into the exciting world of next-gen high-efficiency generator development, collaborating with a dynamic build and test team to push the boundaries of energy technology
- Leverage your mechanical prowess and unique skills to construct cutting-edge components and assemblies for our generators, following procedures while also identifying opportunities for innovation
- Join forces with our talented engineers to troubleshoot, repair, and even reimagine components and assemblies, directly influencing the evolution of our designs
- Become a detective of mechanical systems, conducting thorough inspections of test units and meticulously documenting your findings to provide crucial insights for our engineering team
- Partner with your fellow innovators to proactively identify and implement improvements that enhance both the safety and efficiency of our groundbreaking work
Qualifications
- Minimum of 3 years of hands-on experience with mechanical assembly and/or repair
- Experience with automotive or heavy equipment assembly is a plus
- Proven ability to learn quickly, a strong sense of self-motivation, and a demonstrated commitment to safety
- Experience with precision measuring instruments, capable of measurements down to .001”, using tools such as micrometers, bore gauges, and gauge blocks
- Metal fabrication skills are considered a plus
- Must possess a valid California Driver’s License; Commercial Driver’s License (Class A CDL) is a plus
Does your experience not meet all of our posted requirements? Studies have shown that some people are less likely to apply to positions unless they meet every listed requirement. At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to help us transition the world to clean and affordable electricity, and don’t meet all posted requirements for a particular role, we’d still love to hear from you. Mainspring can sometimes be flexible enough to shift responsibilities for the right person, or otherwise identify open or upcoming roles that may better fit your professional background.
In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.
This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company-specific knowledge.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
About Mainspring
Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities. Mainspring also partners with global energy leaders including AEP, NextEra Energy Resources, Schneider Electric, and more.
The core values that ground our work, guide our decisions, and connect us together:
- Pragmatic Optimism
- Excellence without Ego
- Proactive Collaboration
Job Overview
Responsibilities
- Dive headfirst into the exciting world of next-gen high-efficiency generator development, collaborating with a dynamic build and test team to push the boundaries of energy technology
- Leverage your mechanical prowess and unique skills to construct cutting-edge components and assemblies for our generators, following procedures while also identifying opportunities for innovation
- Join forces with our talented engineers to troubleshoot, repair, and even reimagine components and assemblies, directly influencing the evolution of our designs
- Become a detective of mechanical systems, conducting thorough inspections of test units and meticulously documenting your findings to provide crucial insights for our engineering team
- Partner with your fellow innovators to proactively identify and implement improvements that enhance both the safety and efficiency of our groundbreaking work
Qualifications
- Minimum of 3 years of hands-on experience with mechanical assembly and/or repair
- Experience with automotive or heavy equipment assembly is a plus
- Proven ability to learn quickly, a strong sense of self-motivation, and a demonstrated commitment to safety
- Experience with precision measuring instruments, capable of measurements down to .001”, using tools such as micrometers, bore gauges, and gauge blocks
- Metal fabrication skills are considered a plus
- Must possess a valid California Driver’s License; Commercial Driver’s License (Class A CDL) is a plus
Does your experience not meet all of our posted requirements? Studies have shown that some people are less likely to apply to positions unless they meet every listed requirement. At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to help us transition the world to clean and affordable electricity, and don’t meet all posted requirements for a particular role, we’d still love to hear from you. Mainspring can sometimes be flexible enough to shift responsibilities for the right person, or otherwise identify open or upcoming roles that may better fit your professional background.
In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.
This compensation and benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company-specific knowledge.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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Find R&D Mechanical Engineer JobsR&D Mechanical Engineer Job Market
Who's Hiring
- Sandia National Laboratories11
- Stryker4
- Los Alamos National Laboratory4
- Broadcom3
- Hallmark2
Top Industries Hiring
- Manufacturing
What Employers Look For
The qualifications that appear most often in R&D mechanical engineer jobs.
- Bachelor's degree in mechanical engineering or a closely related engineering discipline
- Proficiency in 3D CAD software such as SolidWorks, CATIA, or Creo
- Experience with FEA or CFD simulation tools such as ANSYS or Abaqus
- Demonstrated experience designing and testing physical prototypes in a lab environment
- Familiarity with GD&T, engineering drawings, and design for manufacturing principles
- Knowledge of materials selection, failure analysis, and product lifecycle development processes
Tips for Your R&D Mechanical Engineer Job Search
Tailor your resume to development stage
R&D roles split between early-stage concept work and late-stage validation. Call out which phase you've worked in, whether that's ideation and prototyping or design verification and design for manufacturing, so hiring managers can place you immediately.
List simulation tools by version
Employers screen for specific CAD and FEA packages. Listing SolidWorks, ANSYS, or CATIA by version signals active, hands-on use rather than classroom exposure. If you've used both legacy and current versions, include both.
Apply early to roles that fit
Migrate Mate lists r&d mechanical engineer openings from across the United States in one place, so you can find roles that match and apply directly to each listing.
Highlight patents and IP contributions
Even a pending patent or a named invention disclosure sets your resume apart in R&D. If your employer holds the IP, describe your design contribution and the problem it solved rather than the patent number itself.
Prepare a hardware walkthrough for interviews
Most R&D panels ask you to walk through a past design from requirements to test. Practice narrating your trade-off decisions out loud, including what failed in early prototypes, because interviewers value engineering judgment over polished outcomes.
Negotiate for lab access and project scope
Beyond compensation, R&D engineers should ask about access to prototype labs, testing equipment, and whether the role owns a full development cycle or supports one. These details determine how fast your skills grow and how much you can claim on your next resume.
R&D Mechanical Engineer Jobs: Frequently Asked Questions
Which companies are hiring the most r&d mechanical engineers?
The most active employers for r&d mechanical engineers right now are Sandia National Laboratories, Stryker, and Los Alamos National Laboratory, and the most openings are in New Mexico, California, and Texas, based on current listings on Migrate Mate as of November 2026. Aerospace, medical device, and advanced manufacturing companies consistently post the highest volume of openings.
How many r&d mechanical engineer jobs are remote?
About 15% of r&d mechanical engineer openings are fully remote or hybrid as of November 2026, which is lower than many engineering roles because hands-on lab and prototype work is central to most R&D functions. Software-heavy sub-specialties like simulation engineering and CAD modeling tend to offer the most remote flexibility within this field.
How do you become a r&d mechanical engineer?
Start with a bachelor's degree in mechanical engineering, then build hands-on prototyping and CAD experience through internships, senior capstone projects, or personal builds. Focus early roles on product development teams where you own a full design cycle. Deepen expertise in a specific domain like thermal systems, structural design, or mechanisms, and pursue relevant certifications in simulation tools to advance into senior R&D positions.
How do you get hired as a r&d mechanical engineer with little experience?
Target roles titled junior mechanical engineer or product development engineer rather than senior R&D positions, since these explicitly welcome early-career candidates. Bring a portfolio of physical projects, whether from coursework, personal builds, or internships, that shows design decisions and test results. Employers in medical devices and consumer electronics frequently hire new graduates specifically to train them on proprietary development processes.
What does the r&d mechanical engineer interview process look like?
Most R&D mechanical engineer interviews run in multiple stages, beginning with a recruiter screen focused on background and tools experience. A technical phone or video interview typically follows, covering mechanical design principles, materials, and trade-off reasoning. Final rounds usually include a design challenge or take-home project alongside a panel interview where you present a past design walkthrough to engineers and a hiring manager.
Where can I find and apply to r&d mechanical engineer jobs?
You can find and apply to r&d mechanical engineer jobs on Migrate Mate, which lists current openings from across the United States. Search the listings to find roles that match your experience and specialization, then apply directly to each one that fits.
See All 69 R&D Mechanical Engineer Jobs
Find roles that match your experience and apply in just a few clicks.
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