This role pays more than
53%
of similar roles. Most pay
$156,507–$216,262
— the shaded band above.
At the midpoint, this role pays about
$182k
versus about
$186k
for comparable roles.
Based on 240 similar postings.
Employer
About Flex (Flextronics)
Flex (formerly Flextronics) is a global technology, supply chain, and manufacturing solutions provider helping companies design, build, and deliver products across industries. Industry: Electronics Manufacturing Services
Flex (Flextronics) currently has
29 open roles
on FindRole.
Listed pay typically runs
$118,300–$162,600
across 15 roles with salary data.
The Principal Thermal Mechanical Engineer joins the engineering team to provide technical leadership and mentorship during early product development and maturation phases. This role involves leading the architecture, design, analysis, and optimization of complex fluid and thermal systems, including pumps, tubing, and heat exchangers for advanced computing platforms. The engineer will own deliverables from concept through production, ensuring designs meet performance, reliability, and manufacturability requirements while serving as a technical partner to customers. Key responsibilities include driving simulation and testing to validate fluid flow, pressure drop, and material compatibility. Required expertise includes fluid dynamics, thermodynamics, and heat transfer principles applied to data center thermal management or related industries like automotive or nuclear. The role focuses on solving complex cooling challenges by developing innovative liquid cooling solutions for high-performance computing environments through rigorous technical documentation and cross-functional leadership.
Lead the architecture, design, analysis, and optimization of complex fluid and thermal systems including pumps, tubing, and heat exchangers.
Manage mechanical and fluid system deliverables from initial concept through final production while ensuring manufacturability and compliance.
Serve as a technical partner to customers to support the integration of fluid solutions into broader product architectures.
Drive simulation, analysis, and testing to validate fluid flow, pressure drop, thermal performance, and material compatibility.
Develop and approve engineering requirements, specifications, and technical documentation in accordance with industry standards.
Lead design reviews by presenting technical tradeoffs, risks, and recommendations to cross-functional teams and senior stakeholders.
Identify technical gaps and lead exploratory R&D efforts to build foundational knowledge and intellectual property.
Provide technical leadership and mentorship to engineers across all experience levels to improve team capability.
What we're looking for
Minimum of 7 years of experience designing and engineering fluid systems in data center thermal management, automotive, medical, or nuclear industries.
At least 3 years of direct experience with Coolant Distribution Units (CDUs).
Deep expertise in fluid dynamics, thermodynamics, and heat transfer using first principles engineering.
Proven track record of new product development for thermal or fluid systems from concept through validation testing.
Demonstrated technical leadership and mentorship of development teams within a structured product development environment.
Ability to lead design reviews and communicate complex technical concepts to cross-functional teams and senior stakeholders.
Strong skills in troubleshooting, optimizing, and documenting complex fluid systems across production phases.
Mechanical Engineering
Structural Design
Thermal-Mechanical Integration
Liquid Cooling
DFM
DFA
Reliability Engineering
Product Development
Rack Systems
Power Distribution
Manufacturing Readiness
Failure Analysis
Electromechanical Systems