Thermal Systems Engineer II
Confirmed on the employer's own hiring board on Nov 15, 2026. First seen by Alion on Jan 20, 2026. Johnson Controls scores B on the Alion truth index.
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, visitEEO is the Law. If you are an individual with a disability and you require an accommodation during the application process, please visit here.