Principal Thermal-Fluid Engineer, Data Center Cooling

JETCOOL Technologies Inc.; Littleton (MA); On-site; USD 120,000 - 190,000; Full time

Job summary

JetCool in Littleton, MA is seeking a Principal Thermal Mechanical Engineer to lead fluid systems design for advanced liquid cooling solutions in data centers. You will drive concept development, simulations, and DFMs while mentoring junior engineers and coordinating with customers and internal teams.

Reporting to the Product Manager, you’ll shape technical strategies, review designs, and push for innovation in heat transfer and thermal management.

Qualifications

• Master's degree (thesis required) in Mechanical Engineering or related field.
• 7+ years of post-collegiate experience designing and engineering fluid systems.
• 3+ years in senior/principal engineer roles in an industrial setting.
• Expertise in fluid dynamics, thermodynamics, and heat transfer.
• Strong background in engineering fundamentals and product development.
• Experience with SolidWorks CAD, drawings, GD&T, and DFMs.

Responsibilities

• Lead initial design, analysis, and optimization of complex fluid systems from concept to final CAD.
• Collaborate with customers and partner teams to integrate fluid systems into product designs.
• Perform fluid flow simulations and tests to ensure performance and reliability.
• Develop specifications and documentation for fluid systems and heat transfer.
• Provide technical guidance and mentor junior engineers; participate in design reviews.
• Drive research and development to close technical gaps and enable IP.

Skills

Fluid dynamics

Thermodynamics

Heat transfer

SolidWorks CAD

GD&T

DFMs

Product concepts

Performance analysis

Design of experiments

Communication skills

Education

Master's degree in Mechanical Engineering

Tools

SolidWorks

Job description

JetCool in Littleton, MA is seeking a Principal Thermal Mechanical Engineer to lead fluid systems design for advanced liquid cooling solutions in data centers. You will drive concept development, simulations, and DFMs while mentoring junior engineers and coordinating with customers and internal teams.

Reporting to the Product Manager, you’ll shape technical strategies, review designs, and push for innovation in heat transfer and thermal management.