Allen began his radio career at the OSU station,
WOSU, and also worked for a commercial station in Columbus. The couple then moved to New York City, where Allen began his long tenure as announcer at
WQXR radio in 1947. His connection with the Metropolitan Opera began in 1973 when he served as the backup for
Milton Cross who had been announcing the Met's Saturday afternoon broadcasts since their inception in 1931. In 1975, after Cross's sudden death, Allen took over as announcer for the Met and continued in the job until 2004. The smooth, intelligent delivery and warmth of Allen's on-air persona endeared him to millions of opera listeners during his long tenure at the Met. Allen retired in May 2004 after 29 seasons and was succeeded by
Margaret Juntwait. Allen was also the announcer for
Live from the Metropolitan Opera broadcasts on television. == Other professional activities ==