Complex sentence: He became Executive Vice President of Sales for Paramount Pictures in the late 1960s; in that position, his expert marketing of the film "Love Story" (1970) led to his appointment as Paramount Studios' President in 1971.
Split into simpler sentences: He became Executive Vice President of Sales for Paramount Pictures in the late 1960s. In that position, his expert marketing of the film "Love Story" (1970) led to his appointment as Paramount Studios' President in 1971.