Dr. Geer is an entrepreneur, author, scientist, consultant, teacher, and architect. Most recently, he served as CTO with @stake, a leading digital security consulting firm. Previously, Dr. Geer ran the development arm of MIT's Project Athena, where Kerberos, the X Window System, and much of what we take for granted in distributed computing was pioneered by his staff on his watch. For many years he has provided high-level strategy in all manners of digital security and in promising areas of security research to industry leaders, especially in engineering and finance as a consultant and as an officer in a series of relevant startups. He is a widely noted author in scientific journals, the technology press, and has co-authored several books on risk management and information security. Dr. Geer has testified before Congress on multiple occasions and has served in formal advisory roles for the Federal Trade Commission, the National Science Foundation, the Treasury Department, the National Research Council, the Commonwealth of Massachusetts, the Department of Defense, the National Institute of Justice, and the Institute for Information Infrastructure Protection. Geer holds several security patents, received an Sc.D. in Biostatistics from Harvard and an S.B. in Electrical Engineering from MIT. He serves both fiduciary and nonfiduciary roles for a number of promising startups. He is also Past President of the USENIX association.