[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Johnson Controls International jobs](https://jobs.opennash.com/companies/johnson-controls-international/) · [Search jobs](/search/) Johnson Controls International # Senior Modeling Engineer Milwaukee-Wisconsin-United States of America +1 more Remote Full-time Senior individual contributor Operations Listed on Johnson Controls International’s official careers site. Posted March 9, 2026. Check that it is still open and apply there. [Apply on Johnson Controls International’s careers site →](https://jci.wd5.myworkdayjobs.com/JCI/job/Milwaukee-Wisconsin-United-States-of-America/Senior-Modeling-Engineer_WD30263769) [OpenNash Jobs](https://jobs.opennash.com/) / [Johnson Controls International](https://jobs.opennash.com/companies/johnson-controls-international/) / Senior Modeling Engineer ## Job description ### What You Will Do Johnson Controls’ Data Center Thermal Technology Solutions group is seeking a Senior Modeling Engineer. As a member of the modeling team, you will develop and apply numerical models to simulate the end-to-end performance of data center cooling systems. You will play a key role on cross-functional teams responsible for creating comprehensive thermal solutions for data center applications. Your primary focus will be simulating system performance and providing design and application guidance based on model results. As part of the advanced development team, you will also stay current on emerging technologies in the data center cooling space and evaluate innovations that may influence future product offerings. We prefer to have this candidate based in our Glendale, WI, or York, PA, office; however, this can also be a remote opportunity for the right candidate! How You Will Do It Develop numerical simulations of thermal components commonly used in data center applications. Integrate subsystems into complete thermal solutions, coordinating across cooling loops, controls, and heat-rejection equipment. Use simulation tools to predict chip-to-ambient performance of data center cooling systems. Apply system-level performance models to provide technical guidance to customers. Present project status, technical findings, and strategic recommendations across departments. Deliver presentations and/or write white papers communicating JCI’s technical perspective on emerging technologies and system architectures. Actively participate in industry groups such as ASHRAE and the Open Compute Project. ### What You Will Need Required Master’s or PhD in Mechanical Engineering or a related field. 3+ years of industry experience with thermal products or systems. Strong theoretical foundation in thermodynamics, heat transfer, and fluid mechanics. Experience with HVAC system design, refrigerant cycles, and component selection. Proficiency with numerical simulation tools for building and thermal applications (e.g., Modelica, MATLAB/Simulink, EES, EnergyPlus). Broad cross-domain knowledge spanning thermal, controls, and electrical systems—generalists with strong multidomain capability are highly valued. Proficiency with Microsoft 365/Excel, including basic macros/VBA for data analysis and reporting. Demonstrated ability to execute cross-functional projects. Preferred Python scripting and environment management (package installation, virtual environments, basic automation). Fundamentals of controls engineering (feedback loops, PID tuning, system response). Basic understanding of electrical systems (motor sizing, VFDs, power distribution). Experience with refrigeration system design and refrigerant properties. Familiarity with data center cooling architectures (direct liquid cooling, rear-door heat exchangers, CDUs). Expertise in one or more thermal domains (CDUs, chillers, dry coolers, cold‑plate systems). 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. ## At a glance - Posted by the employer: Mar 9, 2026 - First seen by OpenNash: Oct 13, 2026 - Last checked: Oct 20, 2026 - Listed for: 225 days - Location: Milwaukee-Wisconsin-United States of America +1 more - Work arrangement: Remote - Employment type: Full-time[Apply on Johnson Controls International’s careers site →](https://jci.wd5.myworkdayjobs.com/JCI/job/Milwaukee-Wisconsin-United-States-of-America/Senior-Modeling-Engineer_WD30263769) ## More jobs at Johnson Controls International ### [AC/ Refrigeration Engineer](https://jobs.opennash.com/companies/johnson-controls-international/jobs/1ebd356ed60790cd3af6/) ### [AI Application Engineer](https://jobs.opennash.com/companies/johnson-controls-international/jobs/922a18cd79be138cd21e/) Pune-Maharashtra-India ### [AI Engineer](https://jobs.opennash.com/companies/johnson-controls-international/jobs/b8b4453183711af462cc/) San Jose-San Jose-Costa Rica ### [AI Platform Engineer](https://jobs.opennash.com/companies/johnson-controls-international/jobs/9e612d2a0e4f682f66ee/) Irving-Texas-United States of America +1 more ## Similar jobs at other companies ### [Modeling and Simulation Engineer](https://jobs.opennash.com/companies/lockheed-martin/jobs/3e166ba5389ddac1bf9e/) Lockheed Martin · Uniondale, NY ### [Device Modeling Engineer, Senior](https://jobs.opennash.com/companies/qualcomm/jobs/81ac01c952278ccf8c5e/) Qualcomm · Tijuana, Baja California, Mexico ### [Systems Engineer Senior - Modeling & Simulation](https://jobs.opennash.com/companies/lockheed-martin/jobs/eba570dab882bc1e0d11/) Lockheed Martin · Sunnyvale, CA ### [RGP - Advanced Mixed Signal Modeling Engineer](https://jobs.opennash.com/companies/infineon-technologies/jobs/602631ed6ee19858228b/) Infineon Technologies · Andover, MA ### [SoC Modeling Engineer](https://jobs.opennash.com/companies/qualcomm/jobs/52d4b719915a6809d208/) Qualcomm · San Diego, California, United States of America OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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