 Mark was also served as music director during part of his time at Y100 and was substitute newsman on Tanner's show.John Hartman was music director during the early 1970s until Colleen "The Vinyl Queen" Cassidy became the first female music and research director in 1978, moving in from WMAQ in Chicago, which had been run by eventual iHeartMedia CEO Bob Pittman.Cassidy started Y100's first call-out research department.