Thermal Systems Engineer II

Alloy Enterprises; New Freedom (York County); On-site; USD 95,000 - 130,000; Full time

Job summary

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. The role requires minimal supervision and leadership of small technical efforts, with a focus on thermal chain understanding from server to ambient.

The position is onsite in New Freedom, PA, with a requirement to be within commuting distance or relocate.

Qualifications

• B.S. in Mechanical Engineering or related field required.
• 2+ years of thermal/HVAC design experience.
• Proficiency with CAD tools (SolidWorks, Creo) and data analysis (Excel).
• Engineering calculations and documentation experience (MathCAD, EES).
• Heat transfer analysis and thermodynamic cycle analysis knowledge.
• Fluid mechanics and hydraulic system design experience.
• Product development lifecycle experience and hands-on testing.

Responsibilities

• 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 across the complete thermal chain.
• Participate in process improvements for testing and analysis methods; guide and mentor less experienced engineers.

Skills

Thermal design

HVAC design

Excel

MathCAD/EES

Heat transfer analysis

Thermodynamics

Fluid dynamics

Cross-functional teamwork

Documentation

Prototype testing

Education

Bachelor of Science in Mechanical Engineering

Tools

SolidWorks

Creo

MATLAB/Simulink

Python scripting

MathCAD

EES

Job description

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 methodsGuide 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.