Thermal Systems Engineer II

• What you will do
• Johnson Controls is seeking a Senior Thermal Data Center Systems Engineer to support the thermal subsystem or component designs within the data center cooling product portfolio. In this role, you will operate with minimal supervision, determining approaches to thermal solutions and leading small technical efforts. You will demonstrate proficiency across multiple thermal domains and understands the complete thermal chain from server to ambient. 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.

How you will do it

Own thermal subsystem or component designs for data center cooling products (dry coolers, remote condensers, CDUs, cold plate systems)

Define specifications for thermal features or products; develop test protocols and acceptance criteria

Lead prototype development and validation activities; develop and execute comprehensive test plans

Integrate multiple components into subsystem solutions understanding the complete thermal chain

Participate in process improvement for testing and analysis methods

Guide and mentor less experienced engineers; represent Engineering in cross-functional activities

• What you will need
• Required
• Bachelor of Science in Mechanical Engineering or related field required
• 2+ years of thermal/HVAC design experience
• Microsoft 365/Excel (including basic macros/VBA for data analysis and reporting)
• CAD proficiency (SolidWorks, Creo, or equivalent)
• Engineering calculations and documentation (MathCAD, EES, or equivalent)
• Heat transfer analysis (conduction, convection, two-phase)
• Thermodynamic cycle analysis
• Fluid mechanics and hydraulic system design
• Thermal system component sizing and selection
• Product development lifecycle experience
• Prototype fabrication and hands-on testing
• Cross-functional project execution

• Preferred
• Python scripting and environment management (package installation, virtual environments, basic automation)
• CFD (ANSYS Fluent, Star-CCM+, OpenFOAM, or equivalent)
• FEA (ANSYS Mechanical, Abaqus, or equivalent)
• MATLAB/Simulink for system modeling and controls
• Controls fundamentals (feedback loops, PID tuning, system response)
• Electrical systems basics (motor sizing, VFDs, power distribution)
• Refrigeration system design and refrigerant properties
• Data center cooling architectures (direct liquid cooling, rear-door heat exchangers, CDUs)

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. To view more information about your equal opportunity and non-discrimination rights as a candidate, visit EEO is the Law . If you are an individual with a disability and you require an accommodation during the application process, please visit here .