At Reality Labs we aim to bring together the brightest cross-disciplinary minds in one place to deliver on our mission: build tools that help people feel connected, anytime, anywhere. As a System Thermal Performance Engineer you will take a critical role in developing systems for VR, AR, Smart Glasses and Wearables, or New Technology Initiatives. You will be part of a team exploring and developing consumer electronics products over the full lifecycle, from prototypes to mass-production. You will work as part of a cross functional team requiring collaboration and curiosity in domains inside and outside thermal engineering. Our ideal candidate has strong physics based low order modeling fundamentals (including fluid systems), simulation experience (from a simple DAE system to high order analysis e.g. CFD), is comfortable modeling initially unknown to them physical systems with variable degrees of fidelity, and capturing their key interactions at the system level. This might include fan performance, display performance, die temperature dynamics, etc. They should also be comfortable enough with control theory to propose architectures spanning multi subsystems, prototype and eventually validate them. As a result, they partner with product managers to define objectives of system performance tools and throttling logics, as well as discuss implementation with software engineers. Finally and above all, they can propose unconventional solutions that intersect analytical approaches and our unique products.