He founded the Freezer Queen frozen food company in Buffalo in 1958 and founded the Darien Lake theme park after purchasing 500 acres (2.0 km2) of land in Genesee County, New York in 1964, owning the resort and slowly developing it into a major amusement park until he sold the resort in 1983. He also briefly operated a (now demolished) Industrial Park located on the southeastern grounds of the Buffalo Niagara International Airport in the late 1980s. Snyder owned the Buffalo Hyatt Regency in the 1990s and opened the renown E.B. Green's Steakhouse within the hotel.
In 1971, Snyder purchased the Buffalo Braves, which was an expansion team in the 1970-1971 NBA season, from the original hedge fund managers who had secured the expansion franchise. He sold the team in 1977, unable to compete with the much more successful Buffalo Sabres, who also debuted in the National Hockey League in 1970, or with the local college basketball teams, who were largely hostile toward professional basketball in Buffalo and managed to prevent Snyder from securing home games at the Auditorium. The franchise later moved to San Diego (in a complicated swap with the Boston Celtics), then to Los Angeles, where it plays as the Los Angeles Clippers.