Robert is CEO of RayVio, a Silicon Valley-based health & hygiene company with an innovative ultraviolet LED technology. Applications include water, air and surface disinfection, medical treatments and industrial curing; with a particular focus on consumer safety products that enhance people’s lives and health. From 2007-2012, he was a Partner at Sierra Ventures, a private venture capital firm that manages more than $1.5 billion of committed capital. Dr. Walker focused on investments in solid state lighting, displays, clean technology, solar energy and semiconductors. Prior to Sierra he was CEO of BridgeLux, a high power LED lighting company, from 2005-2007, and served on its Board of Directors from 2004. In 2003 Dr. Walker founded YEBY Associates, a Silicon Valley-based consultancy specializing in the Solid State Lighting industry, and continues to serve as a Principal there. Key activities included launching Intematix’ phosphor business, Strategies Unlimited’s research in the Asian LED markets, the Chinese government’s solid state lighting program, and a series of LED conferences in Taiwan. From 2001-2004 he was Managing Director-USA of Vincera Ventures, a US$150M venture capital fund based in Taiwan with several investments in the areas of LEDs and compound semiconductors. During his 8 years at EMCORE Corporation, a leading provider of MOCVD equipment to the compound semiconductor industry, he held a variety of sales and marketing positions, including General Manager, Pacific Rim. Prior to joining the compound semiconductor industry, Dr. Walker spent 10 years conducting high energy physics research, including several years living in Japan. He is an author of the paper announcing the discovery of the “Top” quark, one of the fundamental particles of nature. He received his Ph.D. in Physics from Caltech in 1989 and a triple major in math, physics and computer engineering from the University of Wisconsin–Madison in 1984. He has traveled extensively throughout the Pacific Rim region, and has been involved with the solid state lighting industry in Taiwan, Korea and China since its inception.