Complex sentence: In 1993, she starting working as a set designer and property master on films, commercials, and musical theatre productions, frequently working on M. Night Shyamalan's films.
Split into simpler sentences: In 1993, she began her career as a set designer and property master. Steave-Dickerson worked on films, commercials, and musical theatre productions, frequently working on M. Night Shyamalan's films.