Louis Le Lay

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I'm Louis Le Lay, a robotics engineer working on making humanoid robots genuinely agile through reinforcement learning and simulation.

I contributed to the creation of mjlab [ tweet ], an Isaac Lab-style RL framework built on MuJoCo Warp, and I'm an active contributor to Isaac Lab.

At PAL Robotics, I owned the RL locomotion effort for the Kangaroo humanoid end-to-end: built the full pipeline from scratch, led the technical direction, and open-sourced the stack (pal_mjlab).

Louis Le Lay
Kangaroo humanoid walking with RL locomotion G1 robot getting up using reinforcement learning Tennis motion retargeting to a robot

Publications

For a complete and up-to-date list of publications, see my Google Scholar profile.

Kevin Zakka, Qiayuan Liao, Brent Yi, Louis Le Lay, Koushil Sreenath, Pieter Abbeel
arXiv preprint, Jan 2026

Software

PAL Robotics' robots in mjlab. Standard RL interface for Kangaroo, Talos, and TIAGo.
Isaac Lab API on MuJoCo Warp. Led by Kevin Zakka.
Isaac Lab training to real Kinova Gen3 deployment via ROS 2.
RL manipulation tasks for SO‑ARM100/101 in Isaac Lab.

Talks