Complex sentence: Johnson's work in sound editing for film took off with the popular science fiction films' (1994) and "Independence Day" (1996), after which he went on to become a highly regard supervising sound editor in Hollywood.
Split into simpler sentences: Johnson's work in mainstream cinema took off with the popular science fiction films' (1994) and "Independence Day" (1996). With the success of those projects, he went on to become a highly regard supervising sound editor in Hollywood.