The Hall's induction biography says that "His peers described him as an honest and intelligent rider, qualities he later demonstrated as a racing official and state steward for New Jersey."
The winner of numerous important races, Boulmetis won the Arlington Classic twice and the prestigious Washington, D.C. International Stakes and Canadian International Stakes, forerunners to the Breeders' Cup races which drew the best horses to the United States and Canada from around the world.
Among the other notable horses he rode was Hall of Fame inductee Tosmah with whom he won seven stakes races.
In the 1955 Massachusetts Handicap, Boulmetis rode Helioscope to a track record time of 2:01 for 1¼ miles on dirt, unbroken as of 2008.
His son, Sam Boulmetis Jr., followed in his footsteps, becoming a professional jockey in 1973 and riding until 1981 when a racing accident left him paralyzed from the waist down.