 Greene began his career in 1970 as a reporter and producer for KABC-TV in Los Angeles.Later in 1973, Greene was hired to help launch the news operations for KCST-TV (now KNSD) which at the time became the new ABC affiliate for San Diego.After serving one year as anchor/news director at Channel 39, he moved over to rival station, then-NBC affiliate KGTV, where his co-anchoring "The News" with Jack White and his acclaim for his coverage of the Chicano rights movement helped the station briefly overtake rival KFMB in the ratings.