Senior Thermal Engineer - Liquid Cooling

Overview Piper Companies is looking for a Senior Thermal Engineer - Liquid Cooling to join a cutting edge startup company on site in Saratoga, CA. The ideal Senior Liquid Cooling Thermal Engineer will lead liquid cooling architecture, simulation, validation, and system level thermal design for advanced computing hardware. Responsibilities Lead thermal design efforts for high power computing systems with a focus on liquid cooling solutions, cold plates, manifolds, and advanced heat transfer technologies Drive thermal modeling, simulation, and system level analysis to optimize performance and reliability Oversee thermal validation, lab testing, instrumentation strategies, and correlation of test data to simulations Collaborate closely with mechanical, electrical, packaging, and manufacturing teams to ensure seamless integration of thermal solutions across the full hardware lifecycle Qualifications 5+ years' experience as a thermal engineer supporting liquid cooling solutions for electronics or high density computing hardware Must be eligible to work in the United States and obtain and maintain an Active U.S. Government Secret Clearance Hands on experience with thermal simulation tools including Icepak, Flotherm, COMSOL, or ANSYS Strong knowledge of thermal architecture, heat transfer, liquid cooling design, and system level thermal behavior Experience performing lab based thermal testing, characterization, and data interpretation Background working with advanced packaging, high power modules, or multi die systems is preferred Bachelor’s or Master’s degree in Mechanical Engineering, Thermal Engineering, or a related field Compensation and Benefits Salary Range: $200,000 - $260,000 base plus stock Comprehensive Benefits: Medical, Dental, Vision, 401K, PTO, Sick Leave when required by law, and Holidays This job opens for applications on 2/16/2026. Applications for this job will be accepted for at least 30 days from the posting date. #J-18808-Ljbffr Piper Companies