Senior Thermal Engineer - Data Center

Senior Thermal Engineer

Johnson Controls' Data Center Thermal Solutions team is seeking a Senior Thermal Engineer for the Advanced Technology & Innovation group. The role focuses on developing, validating, and deploying liquid cooling solutions, including direct-to-chip, immersion, and hybrid systems for hyperscale, colocation, and AI/HPC data centers. The ideal candidate will be highly self-driven, able to work independently with limited supervision, and bring strong knowledge of GPU-based AI hardware and its cooling and power variations across diverse AI workloads. This position is based onsite, minimum 3 days per week, at our Advanced Technology and Innovation Center located in New Freedom, PA. Candidates must be commuting distance to the facility or able to relocate.

Design, analyze, and deploy liquid cooling systems (single-phase, two-phase, immersion, and hybrid) for high-density data centers.

Perform thermal modeling, CFD simulations, and performance optimization for CPU and GPU workloads.

Commission and validate CDUs, cold plates, immersion tanks, and thermal test vehicles at lab and facility scale.

Evaluate system resiliency and reliability under operational and failure scenarios.

Collaborate with hyperscalers, OEMs, and partners to align solutions with AI/HPC workload demands.

Contribute to patent filings, publications, and industry standards engagement.

PhD or Master's in Mechanical Engineering or related field.

Proven data center cooling experience, particularly in GPU/AI hardware environments.

Strong knowledge of heat transfer, fluid mechanics, and thermodynamics.

Proficiency in CFD tools (ANSYS, Fluent, Modelica, Icepak, Cadence 6Sigma) and instrumentation for performance validation.

Demonstrated ability to work independently, set priorities, and deliver results with minimal supervision.

Track record of innovation, patents, or technical publications in thermal management.

HIRING SALARY RANGE: $90,000 - $120,000 (Salary to be determined by the education, experience, knowledge, skills, and abilities of the applicant, internal equity, location and alignment with market data.) This role offers a competitive Bonus plan that will take into account individual, group, and corporate performance. This position includes a competitive benefits package. For details, please visit the About Us tab on the Johnson Controls Careers site.

Johnson Controls International plc. is an equal employment opportunity and affirmative action employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, protected veteran status, genetic information, sexual orientation, gender identity, status as a qualified individual with a disability or any other characteristic protected by law.