Len Bass is a Senior Member of the Technical Staff at the SEI. He has coauthored two award-winning books in software architecture as well as several other books and numerous papers in a wide variety of areas of computer science and software engineering. He has been a keynote speaker or a distinguished lecturer on six continents. He is currently working on applying the concepts of ultra-large-scale systems to the smart grid. He has been involved in the development of numerous different production or research software systems, ranging from operating systems to database management systems to automotive systems. He is a member of the IFIP Working Group on Software Architecture (WG2.10).