Walling's career began in 1965 as a newspaper reporter in Quebec City. He soon moved into radio and, in 1972, he moved to Halifax where he began working for
CHNS. He began the first full-time sports talk show there in 1972 with a show that ran on Sunday nights from 10:30 until midnight. As the first full-time sports director for CHNS, his first major assignment was in Edmonton, Alberta where he covered the Dartmouth Dairy Queen team, which was vying that year for the National Softball title. He also covered major sporting events, including the 1972
Summit Series where he was one of the first to talk to
Paul Henderson moments after the historic "goal heard around the world". Walling reported on
Atlantic University football for more than twenty years. In 1984, he was president and general manager of Western Broadcasting in
Corner Brook, Newfoundland where he started CKWK 1340, an AM radio station now operating as
CKXX-FM. Three years later, in 1987, he became general manager of CJGL-FM in
Swift Current, Saskatchewan. While his family remained in Corner Brook, for several months he commuted between the two stations. In 1988, he became the first sports anchor at the independent Halifax and Saint John-based
MITV television station (now part of Global). That same year, he founded the Atlantic Media Institute in Halifax, which he sold in 2000. In July 2015, Walling became the host of the Cobequid Radio Society's CIOE-FM morning drive show, broadcast live from Lower Sackville each weekday. ==Personal life and death==