Which jobs did Ayn Rand hold in the film industry before becoming a successful novelist?

After moving to Hollywood in 1926, Ayn Rand held several positions within the film industry as she pursued her career:

• Movie extra: Following a fortuitous meeting with producer Cecil B. DeMille, she began her film work as an extra.1
• Screenwriter: She eventually secured work as a screenwriter.1
• Filing clerk: She was hired in the wardrobe department of RKO Radio Pictures, Inc., where she rose to become the head of the department within a year.1

While working these roles, she continued to write stories, plays, and film scenarios in her spare time. Later, after achieving success as a novelist, she also wrote the screenplay for the film adaptation of her book The Fountainhead for Warner Brothers.12