Question:  David O. Russell and Sydney Pollack both work in which profession?

Context paragraphs:
Charlie: The Life and Art of Charles Chaplin: Charlie: The Life and Art of Charles Chaplin is a 2003 American biographical documentary film written and directed by film critic Richard Schickel.  The film explores the personal and professional life of the British actor, comedian and filmmaker, Charlie Chaplin, as well as his legacy and influence.  It is narrated by Sydney Pollack along with many Hollywood personalities appearing in the film talking about Chaplin, including Robert Downey Jr., Norman Lloyd, Bill Irwin, Woody Allen, Johnny Depp, Richard Attenborough, Martin Scorsese, Miloš Forman, Marcel Marceau, David Raksin, Claire Bloom, David Thomson, Andrew Sarris, Jeanine Basinger and Chaplin's children Geraldine, Michael and Sydney Chaplin.  The documentary also benefits from insight from key Chaplin biographers David Robinson and Jeffrey Vance.

William Steinkamp: William Steinkamp (born June 9, 1953) is an American film editor with more than 20 film credits.  He had a longstanding, notable collaboration with director Sydney Pollack, editing nearly all of Pollack's films from "Tootsie" (1982) through the director's last film, "The Interpreter" (2005).

David O. Russell: David Owen Russell (born August 20, 1958) is an American film director, screenwriter, and producer.  His early directing career includes the comedy films "Spanking the Monkey" (1994), "Flirting with Disaster" (1996), "Three Kings" (1999) and "I ♥ Huckabees" (2004).

Sydney Pollack: Sydney Irwin Pollack (July 1, 1934 – May 26, 2008) was an American film director, producer and actor.  Pollack directed more than 20 films and 10 television shows, acted in over 30 films or shows, and produced over 44 films.  His 1985 film "Out of Africa" won him Academy Awards for directing and producing; he was also nominated for Best Director Oscars for "They Shoot Horses, Don't They? " (1969) and "Tootsie" (1982), in the latter of which he also appeared.

David Watkin (cinematographer): David Watkin BSC (23 March 1925 – 19 February 2008) was a British cinematographer, an innovator who was among the first directors of photography to experiment heavily with the usage of bounce light as a soft light source.  He worked with such film directors as Richard Lester, Peter Brook, Tony Richardson, Mike Nichols, Ken Russell, Franco Zeffirelli, Sidney Lumet and Sydney Pollack.

Sketches of Frank Gehry: Sketches of Frank Gehry is a 2006 American documentary film directed by Sydney Pollack and produced by Ultan Guilfoyle, about the life and work of the Canadian-American architect Frank Gehry.  The film was screened out of competition at the 2006 Cannes Film Festival.  Pollack and Gehry had been friends and mutual admirers for years.  The film features footage of various Gehry-designed buildings, including Anaheim Ice (the training rink of the Mighty Ducks of Anaheim), the Guggenheim Museum Bilbao, and the Walt Disney Concert Hall.  It was the final film to be directed by Sydney Pollack before his death in 2008.

Fredric Steinkamp: Fredric Steinkamp (August 22, 1928 – February 20, 2002) was an American film editor with more than 40 film credits.  He had a longstanding, notable collaboration with director Sydney Pollack, editing nearly all of Pollack's films from "They Shoot Horses, Don't They? " (1969) through "Sabrina" (1995).

Castle Keep: Castle Keep is a "firmly pro- and anti-war" 1969 American Technicolor war film combining surrealism with tragic realism filmed in Panavision.  It was directed by Sydney Pollack and starred Burt Lancaster, Patrick O'Neal, Jean-Pierre Aumont, Bruce Dern, and Peter Falk.  The movie appeared in the summer of 1969, a few months before the arrival of Pollack's smash hit "They Shoot Horses, Don't They? ".

Mission: Impossible (film): Mission: Impossible is a 1996 American action spy film directed by Brian De Palma, produced by and starring Tom Cruise.  Based on the , the plot follows Ethan Hunt (Cruise) and his mission to uncover the mole who has framed him for the murders of his entire Impossible Missions Force (IMF) team.  Work on the script had begun early with filmmaker Sydney Pollack on board, before De Palma, Steven Zaillian, David Koepp, and Robert Towne were brought in.  "Mission: Impossible" went into pre-production without a shooting script.  De Palma came up with some action sequences, but Koepp and Towne were dissatisfied with the story that led up to those events.

The Reader (2008 film): The Reader is a 2008 German-American romantic drama film directed by Stephen Daldry and written by David Hare, based on the 1995 German novel of the same name by Bernhard Schlink.  Ralph Fiennes and Kate Winslet star along with the young actor David Kross.  It was the last film for producers Anthony Minghella and Sydney Pollack, both of whom had died prior to release.  Production began in Germany in September 2007, and the film opened in limited release on December 10, 2008.

Supporting paragraphs: David O. Russell Sydney Pollack
Answer: film director