Dr. Joel Sadler is an innovator, computer engineer and entrepreneur. He is perhaps best known as the co-inventor of the JaipurKnee, a budget-friendly prosthetic knee joint, which was listed at number 18 in Times Magazine's "50 Best Inventions of 2009". Dr. Sadler was born in St. Andrew, Jamaica and attended Wolmer's Preparatory School and Campion College, before studying engineering at the Massachusetts Institute of Technology (MIT) in the USA. In 2008, while doing postgraduate studies in Mechanical Engineering at the University of Stanford in California, USA, Sadler, along with classmate Eric Thorsell, designed the device as part of a course project in Medical Device Design. The JaipurKnee is made of self-lubricating, oil-filled nylon and is both flexible and stable, even on irregular terrain. The device was further developed by Stanford University in collaboration with the Jaipur Foot Group, a charity that provides prostheses to Indian amputees. The JaipurKnee has the potential to benefit amputees in low-income communities worldwide. In 2010, Sadler was awarded a Bronze Musgrave Medal from the Institute of Jamaica for his achievement in science. He has garnered more than a decade of experience in product creation across mechanical, electrical hardware and software design for companies such as Apple, Johnson and Johnson and Audi. He earned his Ph.D. from Stanford with his thesis “The Anatomy of Creative Computing” which showed that even a 7-year old could be inspired to prototype their technology ideas without any prior knowledge. Since then, Mr. Sadler has established several start-ups in Silicon Valley including Piper – an education tech start-up with which he is still involved as an Advisor. Since 2023 he has been the Chief Technology Officer of a new division at George Lucas Educational Foundation. He continues to lecture part-time at Stanford University.