Allan Vache was graduated from Roosevelt Elementary School, Rahway Junior High School, and Rahway High School, Rahway, New Jersey 1959-1971. He also attended Jersey City State College, Jersey City, New Jersey 1971-1975. At this time he studied with David Dworkin of the Metropolitan Opera Orchestra, and independently with famed jazz artist Kenny Davern.
From 1972-1975 Allan also performed many professional engagements with such jazz greats as Bobby Hackett, Wild Bill Davison, Pee Wee Erwin, Gene Krupa, Dick Hyman, Max Kaminsky, Clark Terry, Dick Wellstood, Ed Hubble, Cliff Leeman, Bob Haggart, Jack Lesberg, and many others. He also made numerous appearances with his brother, famed jazz cornetist Warren Vache, Jr. From 1974-1975 Allan appeared in the Broadway musical Doctor Jazz at the Winter Garden theater, starring Bobby Van and Lola Falana. He performed with a band that appeared onstage, and Luther Henderson and Dick Hyman wrote instrumental arrangements.