 He also worked as a conductor for CBC Radio concerts out of Regina.In 1950 Blackman was appointed music director at Regina Central Collegiate Institute, later becoming supervisor of music for the Regina high schools in 1961.In 1954–1955 he conducted the Saskatchewan Golden Jubilee Chorus and in 1959 his musical, "Prairie Pastel" (for which his wife Elisabeth Blackman wrote the libretto), was presented for the Regina school's 50th anniversary.