John J. Leonard is an American roboticist and Professor of Mechanical and Ocean Engineering at the Massachusetts Institute of Technology.
A member of the MIT Computer Science and Artificial Intelligence Laboratory (CSAIL), Leonard is a researcher in simultaneous localization and mapping,[2][3] and was the team lead for MIT's team at the 2007 DARPA Urban Challenge, one of the six teams to cross the finish line in the final event, placing fourth overall.
He spent five years as a postdoctoral fellow and Research Scientist in the MIT Sea Grant Autonomous Underwater Vehicle (AUV) Laboratory, and joined the MIT faculty in 1996.
Leonard describes his primary research goal as persistent autonomy, i.e., the "capability for one or more robots to operate robustly for days, weeks and months at a time with minimal human supervision, in complex, dynamic environments".
[4] Leonard focuses on the problem of simultaneous localization and mapping (SLAM), particularly for autonomous underwater vehicles.