The Snob was a 1924 American silent drama film directed by Monta Bell.
 The film starred Norma Shearer and John Gilbert prior to their stardom, together with Phyllis Haver, Conrad Nagel and Hedda Hopper.
 The film was written by Monta Bell, and was based on the novel "The Snob: The Story of a Marriage" by Helen Reimensnyder Martin.
 The film is now considered lost.
The Boy Friend is a lost 1926 American romantic comedy film directed by Monta Bell.
 Based on the play "The Book of Charm" by John Alexander Kirkpatrick, the film starred Marceline Day and John Harron.
 This film also marked the film debut of character actress Elizabeth Patterson.
Brian Thomas Helgeland (born January 17, 1961) is an American screenwriter, film producer and director.
 He is most known for writing the screenplays for "L.A. Confidential" (for which he received the Academy Award for Best Adapted Screenplay), "Mystic River", and "".
 Helgeland also wrote and directed "42" (2013), a biopic of Jackie Robinson, and "Legend" (2015), about the rise and fall of the Kray twins.
After Midnight is a 1927 American silent drama film written and directed by Monta Bell.
 The film stars Norma Shearer and Gwen Lee.
 A copy of "After Midnight" is housed at the Cinémathèque Française.
The Worst Woman in Paris?
 is a 1933 American drama film directed by Monta Bell and written by Monta Bell and Marion Dix.
 The film stars Benita Hume, Adolphe Menjou, Harvey Stephens, Helen Chandler, Margaret Seddon and Adele St. Mauer.
 The film was released on October 20, 1933, by Fox Film Corporation.
Upstage (also known as The Mask of Comedy) is a 1926 American silent romantic drama film directed by Monta Bell, starring Norma Shearer and New York musical comedy star Oscar Shaw.
The working class (also labouring class and proletariat) are the people employed for wages, especially in manual-labour occupations and in skilled, industrial work.
 Working-class occupations include blue-collar jobs, some white-collar jobs, and most service-work jobs.
 The working class only rely upon their earnings from wage labour, thereby, the category includes most of the working population of industrialized economies, of the urban areas (cities, towns, villages) of non-industrialized economies, and of the rural workforce.
The Bellamy Trial is a 1929 American drama film directed by Monta Bell and written by Monta Bell and Joseph Farnham.
 The film stars Leatrice Joy, Betty Bronson, Edward J. Nugent, George Barraud and Margaret Livingston.
 The film was released on January 23, 1929, by Metro-Goldwyn-Mayer.
Monta Bell (February 5, 1891 – February 4, 1958) was an American film director, producer and screenwriter.
The King on Main Street is a 1925 American silent romantic comedy film directed by Monta Bell and starring Adolphe Menjou and Bessie Love.
 The film is based on 1908 French play "Le Roi" by Gaston Arman de Caillavet, Robert de Flers and Emmanuel Arène, and was adapted for the screen by Monte Bell.

Question: Did BOTH Brian Helgeland and Monta Bell's occupations include screenwriter, producer, and director?
Answer: yes