Worked as set decorator in television and films from the late 1950s until 1980. Credits include THE BARBARIAN AND THE GEISHA (1958), HOW THE WEST WAS WON (1962), THE YELLOW CANARY (1963), "The Man from U.N.C.L.E." (1964), YOUR CHEATIN' HEART and HARUM SCARUM (both 1965), "Combat!" (1965, 1966), THE KARATE KILLERS (1967), SPEEDWAY and LIVE A LITTLE, LOVE A LITTLE (both 1968), and ...tick...tick...tick and ZIGZAG (both 1970). After 1971, Greenwood worked exclusively in television.  Nominated for Art Direction/Set Decoration (Color) 1963: HOW THE WEST WAS WON - Set Decoration (w. Henry Grace & Jack Mills) 1 nomination