Principal Thermal Mechanical Engineer

At JetCool a Flex company were at the forefront of liquid cooling innovation delivering advanced solutions that empower our partners in AI and high-performance computing. United by a shared purpose our teams are pushing the limits of whats possible and tackling complex challenges.

A career at JetCool offers the opportunity to make a real impact by helping build smarter more sustainable data were not just advancing technology were redefining cooling standards to create a more sustainable tomorrow.

Job Summary

To support our extraordinary teams who build great products and contribute to our growth were looking to add a Principal Thermal Mechanical Engineer located in Littleton MA.

Reporting to the Mechanical Development Associate Principal Engineer the Principal Thermal Mechanical Engineer will play a pivotal role in the early phases of product development and serving in a guidance capacity through product maturation. Our products drive sustainability across the data center infrastructure by allowing higher coolant temperatures and by driving more complete heat capture for liquid cooling. The Principal Mechanical Engineer will provide technical leadership mentorship and hands-on expertise in mechanical design fluid dynamics and heat transfer but also work closely with customers in communicating the art of the possible with JetCool technology and building a strong customer relationship on a technical level.

What a typical day looks like:

• Lead the architecture design analysis and optimization of complex fluid and thermal systemsincluding pumps fluids tubing heat exchangers and associated componentsfor advanced computing and processing platforms.
• Own mechanical and fluid system deliverables from concept through production ensuring designs meet performance reliability manufacturability and compliance requirements.
• Serve as a technical partner to customers and external collaborators supporting systemlevel integration of fluid solutions into broader product architectures.
• Drive simulation analysis and test efforts to validate fluid flow pressure drop thermal performance and material compatibility across operating conditions.
• Develop review and approve engineering requirements specifications and technical documentation in accordance with applicable industry standards and regulatory expectations.
• Lead and influence design reviews presenting technical tradeoffs risks and recommendations to crossfunctional teams customers and senior stakeholders.
• Identify technical gaps and emerging challenges advocate for targeted research and development and lead exploratory efforts that build foundational knowledge and intellectual property.
• Establish and promote best practices in fluid system design analysis and documentation contributing to a strong engineering culture and continuous improvement.
• Provide technical leadership mentorship and guidance to engineers across experience levels supporting professional development and raising overall team capability.
• Contribute to new product innovation by evaluating emerging technologies industry trends and alternative architectures to drive differentiated fluid system solutions.
• Support the resolution of complex technical issues throughout the product lifecycle including development qualification production and field support as needed.

The experience were looking to add to our team:

• Minimum of 7 years of experience designing and engineering fluid systems in data center thermal management and cooling automotive medical or nuclear industries including at least 3 years of direct experience with Coolant Distribution Units (CDUs).
• Deep expertise in fluid dynamics thermodynamics and heat transfer with strong application of first principles engineering.
• Proven track record of new product development in thermal or fluid systems including concept development performance analysis validation testing and experimental design.
• Strong analytical and problem solving capabilities with demonstrated ability to troubleshoot and optimize complex fluid systems across development and production phases.
• Demonstrated technical leadership within a structured product development environment with clear ownership of mechanical design deliverables from concept through release.
• Experience leading and mentoring development teams driving technical direction coordinating cross functional efforts and ensuring alignment to product requirements and schedules.
• Accountability for product level mechanical execution including leading design reviews resolving technical risks and ensuring designs meet performance reliability manufacturability and compliance requirements.
• Strong communication and technical documentation skills with the ability to clearly communicate complex concepts to technical teams and senior stakeholders.

BO18

What youll receive for the great work you provide:

• Full range of medical dental and vision plans
• Life Insurance
• Short-term and Long-term Disability
• Matching 401(k) Contributions
• Vacation and Paid Sick Time
• Tuition Reimbursement

Job Category

Is Sponsorship Available

JetCool is an Equal Opportunity Employer and employment selection decisions are based on merit qualifications and abilities. We do not discriminate based on: age race religion color sex national origin marital status sexual orientation gender identity veteran status disability pregnancy status or any other status protected by law. Were happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email and well discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at JetCool you must complete the application process first).