Bill Greenleaf’s career began 48 years ago as a co-op student with Pan American Airlines, beginning an association with aircraft and communication and navigation product development that has been his life’s work. For more than 29 years he has been with Rockwell Collins’ Communications, Navigation, and Surveillance organization located in Melbourne, Florida, where he has developed CNS products. As a principal systems engineer, Greenleaf helped Rockwell Collins successfully capture content on the Boeing 787, Airbus A350, Irkut MS-21 and Comac C-919 programs by leading the establishment of the system architectures offered on these aircraft. He is responsible for product architecture development using abstraction layer concepts offering reduced life-cycle maintenance costs and improved reuse across CNS product lines. On three separate occasions, Greenleaf was recognized as a semifinalist or finalist for Rockwell Collins Engineer of the Year. In 2014 he was named a Rockwell Collins Fellow.