Senior Thermal Simulation Engineer (onsite)

About Johnson Controls

Johnson Controls, a global leader in thermal management, mission-critical building systems, energy efficiency, and decarbonization, helps customers use energy more productively, reduce carbon emissions, and operate with the precision and resilience required inrapidly expanding industries such as data centers, healthcare, pharmaceuticals, advanced manufacturing, and higher education.

For more than 140 years, Johnson Controls has delivered performance where it really matters. Backed by advanced technology, lifecycle services and an industry-leading field organization, we elevate customer performance, turn goals into real-world results and help move society forward.

Visit johnsoncontrols.com for more information and follow @Johnsoncontrols on social platforms. 

What you will do

Thermal limits are the hidden bottleneck holding back the world's most advanced technologies—AI infrastructure, semiconductor equipment, power electronics, and mission-critical defense systems. At Johnson Controls, we don't work around those limits—we eliminate them.

Powered by our breakthrough Stack Forging™ process, we engineer high-performance thermal components and integrated cooling loop solutions designed for direct deployment into AI, HPC, and other demanding environments. The result: a best-in-class thermal management platform built for the systems that push performance to the edge—and beyond.

In this role, you won't just model performance—you'll help redefine what's possible. Leveraging both first-principles analysis and advanced computational tools, you'll predict and push the limits of JCI's cutting-edge thermal management technologies.You'll collaborate closely with Solutions Engineers and Thermal Design Engineers to solve complex, high-stakes challenges and optimize designs that meet—and exceed—demanding customer requirements. Along the way, you'll play a key role in shaping our simulation best practices, influencing how we scale excellence, and continuing to learn alongside some of the industry's top simulation talent.

This position requires an onsite presence 4 days a week, with an option to work remotely 1 day a week. Candidates must be commuting distance to the facility, or able to relocate. Only US citizens and/or Permanent Residents of the US will be considered, as sponsorship is not available for this position.

How you will do it

• Hand calculations, select appropriate correlation coefficients, and build simple scaling models

• Perform coupled thermo-fluid simulations using CFD software to predict pressure drop and thermal performance

• Provide guidance and input on customer development projects

• Develop and improve best practices around simulation

What you will need
Required

• Bachelors in Mechanical Engineering, Aerospace Engineering, or other relevant field

• Experience with CFD simulation software

• 7+ years of experience in thermal-fluid simulation and analysis, including but not limited to comfort with selecting turbulence closures, running mesh refinement studies, estimating model error, and extracting dimensionless correlation coefficients from simulations

• Experience with a wide range of reference literature on calculating thermal and fluid behavior of components

• Ability to deliver results in a quickly evolving environment, delivering estimates for thermal performance of a design within a few days to accelerate customer-facing projects

• Familiarity with design engineering work, specifically, an understanding of what an engineering design process looks like and how their work informs that process

HIRING SALARY RANGE: $105,000 - $160,000 (Salary to be determined by the education, experience, knowledge, skills, and abilities of the applicant, internal equity, 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. The posted salary range reflects the target compensation for this role. However, we recognize that exceptional candidates may bring unique skills and experiences that exceed the typical profile. If you believe your background warrants consideration beyond the stated range, we encourage you to apply. To support an efficient and fair hiring process, we may use technology assisted tools, including artificial intelligence (AI), to help identify and evaluate candidates. All hiring decisions are ultimately made by human reviewers. For details, please visit the About Us tab on the Johnson Controls Careers site at