Leo Frachet is a pioneering leader in the transit technology sector and the founder of MobilityData, where he served as Executive Director. He significantly advanced public transportation data standards, drafting key General Transit Feed Specifications (GTFS) widely adopted by the industry. His contributions include GTFS-Pathways in 2018, enhancing accessibility and used by companies like Google; GTFS-Fares in 2022, revolutionizing fare data and employed by platforms such as Apple; and GTFS-Flex in 2024, which supports flexible transit services. Leo also oversaw the creation of the Canonical GTFS Validator, a vital tool for maintaining data quality and consistency in the transit ecosystem.