Jimmy Sastra is a mechanical engineer at OSRF. He received his Ph.D. in Mechanical Engineering and Applied Mechanics from the University of Pennsylvania in August 2011 under the supervision of Mark Yim. At Upenn he developed hardware and software for many generations of Modular Reconfigurable Robots. For his thesis he showed that these robots can be used to quickly prototype and analyze a variety of dynamic locomotion gaits from rolling like a wheel to running with compliant legs. They can even put themselves back together after they are kicked apart into separate pieces. Prior to joining OSRF he has worked at Willow Garage further honing his craft as a mechanical engineer and helping develop future robot designs.