Thermal Simulation Engineer (onsite)

Johnson Controls•Burlington, MA

2d•$90,000 - $130,000•Hybrid

About The Position

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. Join the movement as a Builder on the Stack Forging Thermal Solutions team at Johnson Controls, as a Thermal Simulation Engineer located in Burlington, MA. In this role, you won’t just analyze performance—you’ll help unlock it. Using a blend of first-principles calculations and advanced computational tools, you’ll predict and elevate the performance of JCI’s industry-leading thermal management technologies. Working side-by-side with Solutions Engineers and Thermal Design Engineers, you’ll tackle complex challenges and optimize designs to meet some of the most demanding customer requirements in the industry. You’ll also play a key role in strengthening and evolving our simulation best practices, while learning from and collaborating with a team of top-tier simulation experts. You bring precision, curiosity, and a drive to get it right. You thrive on turning new and complex designs into accurate, actionable insights. With experience in coupled thermo-fluid simulations, you know how to translate detailed analysis into clear, impactful results for engineering teams. Comfortable navigating across projects, technologies, and functions, you’re at your best when collaborating in a fast-moving, cross-functional environment. 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.

Requirements

Bachelors in Mechanical Engineering, Aerospace Engineering, or other relevant field
3+ years of industry experience
Experience with CFD simulation software
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

Nice To Haves

Experience with Siemens SimCenter
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

Responsibilities

Do 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