I am an M.S. student at Cornell Tech's Urban Tech Hub, where I am fortunate to be advised by Dr. Wendy Ju and Dr. Anthony Townsend.
I develop world models that connect perception to planning, enabling what-if reasoning and reliable action for autonomous systems and human decision-makers. My work advances model-based planning, generative simulation, and uncertainty-aware decision support. I aim for methods that transfer across sensor-rich and simulated settings, including cities, facilities, digital environments, and multi-agent tasks, and release open tools, datasets, and evaluations to accelerate adoption and reproducibility.
Previously, I received my B.S. in Mathematics from UT Austin, where I was part of the Urban Information Lab and advised by Dr. Junfeng Jiao.
Please feel free to connect with me here if you'd like to chat.

shl225 [at] cornell [dot] edu
Sean Hardesty Lewis
In Proceedings of SIGGRAPH 2025
Sean Hardesty Lewis, Junfeng Jiao, Yiming Xu, Jihyung Park, Connor Phillips
To be presented at AAAI 2026 Deployable AI Workshop
Happy that StreamTwin was accepted to the Deployable AI Workshop at AAAI 2026. See you in Singapore! 🇸🇬
Thrilled to share that OpenCityCorpus was accepted to the NeurIPS AI4Science workshop. See you in San Diego! 🇺🇸
Proud of my identical twin brother Ryan on starting his PhD at MIT!