Flex · 2 days ago
Principal/Thermal Mechanical R&D Engineer
Littleton, MA
Full-time
Onsite
Senior Level, Lead/Staff
$138K/yr - $190K/yr
7+ years expFlex is a diversified manufacturing partner that helps market-leading brands design, build, and deliver innovative products. The Principal Thermal/Mechanical R&D Engineer will be responsible for creating and implementing advanced thermal and mechanical designs, providing technical leadership, and working closely with customers to deliver cutting-edge cooling solutions.
ElectronicsManufacturingProduct Design
Responsibilities
Drive innovation by introducing new ideas and critical thinking to advance cooling technologies for improved performance, manufacturability, and reliability
Lead the conceptual design, analysis, and optimization of complex fluid systems, including pumps, fluids, tubing, and heat exchangers, for next-generation processors
Perform advanced fluid flow simulations, analyses, and validation tests to ensure optimal performance under various operating conditions while collaborating with customer and cross-functional teams to integrate fluid systems into overall product designs
Develop and review engineering specifications, and documentation for fluid system and heat transfer components and assemblies, ensuring compliance with industry standards and regulatory requirements
Oversee prototype fabrication, testing, and validation, diagnosing and resolving technical issues during development phases and provide technical guidance and mentorship to junior engineers
Assist in maintaining a strong best practice culture and driving additional foundational knowledge and IP through research
Identify technical gaps, advocate for R&D initiatives, IP, and lead research projects to maximize product impact and value
Qualification
Required
Master's (Thesis required) degree in Mechanical Engineering or related field
Minimum of 7 years of post-collegiate experience in designing and engineering thermal fluid systems, preferably within the data center cooling, automotive, combustion, aerospace, medical, or nuclear industries
Profound expertise in fluid dynamics, thermodynamics, and heat transfer, with a strong foundation in engineering principles
Strong analytical and problem-solving skills, with the ability to effectively troubleshoot and optimize fluid system performance
Impacts the medium-term (semi-annual/annual) direction and financial or operational success of the function. Approves and/or creates functional processes or technologies. Executes and provides input to functional strategic plans and objectives for site. Assists in developing plans for structuring and implementing major initiatives
Excellent communication skills to convey complex technical concepts to both technical and non-technical audiences
Be a good person and a good team player
Demonstrates skills in teaching/leading and/or mentoring. Models appropriate behavior in support of Flex values
Company
Flex
Flex designs, manufactures, and supplies electronics products for the industrial sector.
10001+ employees
H1B Sponsorship
Flex has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
2024 (1)
Funding
Current Stage
Public CompanyTotal Funding
$200MKey Investors
CienaSilver Lake
2023-11-29Post Ipo Equity
2003-03-03Post Ipo Equity· $200M
1994-03-25IPO
Leadership Team
Revathi Advaithi
Chief Executive Officer
Kevin Krumm
Chief Financial Officer
Recent News
2026-01-12
2026-01-05
Company data provided by crunchbase