Are Sam Peckinpah and Seth Holt both film producers?
yes
Seth Holt
Seth Holt (1923, Palestine – 14 February 1971, London) was a British film director, producer and editor.
 His films are characterized by their tense atmosphere and suspense, as well as their striking visual style.
 In the 1960s, "Movie" magazine championed Holt as one of the finest talents working in the British film industry, although his output was notably sparse.
Sam Peckinpah
David Samuel Peckinpah ( ; February 21, 1925 – December 28, 1984) was an American film director and screenwriter who achieved prominence following the release of the Western epic "The Wild Bunch" (1969).
 He was known for the visually innovative and explicit depiction of action and violence as well as his revisionist approach to the Western genre.
Lou Lombardo (filmmaker)
Lou Lombardo (February 15, 1932 – May 8, 2002) was an American filmmaker whose editing of the 1969 film "The Wild Bunch" has been called "seminal".
 In all, Lombardo is credited on more than twenty-five feature films.
 Noted mainly for his work as a film and television editor, he also worked as a cameraman, director, and producer.
 In his obituary, Stephen Prince wrote, "Lou Lombardo's seminal contribution to the history of editing is his work on "The Wild Bunch" (1969), directed by Sam Peckinpah.
 The complex montages of violence that Lombardo created for that film influenced generations of filmmakers and established the modern cinematic textbook for editing violent gun battles."
 Several critics have remarked on the "strange, elastic quality" of time in the film, and have discerned the film's influence in the work of directors John Woo, Quentin Tarantino, Kathryn Bigelow, and the Wachowskis, among others.
 While Lombardo's collaboration with Peckinpah lasted just a few years, his career was intertwined with that of director Robert Altman for more than thirty years.
 Lombardo edited Altman's 1971 film "McCabe & Mrs. Miller" (1971), which had "a radical approach to the use of dialogue and indeed other sound, both in and beyond the frame."
 Towards the end of his career Lombardo edited "Moonstruck" (1987) and two other films directed by Norman Jewison.
 While his editing is now considered "revolutionary" and "brilliant", Lombardo was never nominated for editing awards during his career. The Osterman Weekend (film)
The Osterman Weekend is a 1983 suspense thriller film directed by Sam Peckinpah, based on the novel of the same name by Robert Ludlum.
 The film stars Rutger Hauer, John Hurt, Burt Lancaster, Dennis Hopper, Meg Foster, Helen Shaver, Chris Sarandon and Craig T. Nelson.
 It was Peckinpah's final film before his death in 1984. The Deadly Companions
The Deadly Companions is a 1961 American Western film directed by Sam Peckinpah and starring Maureen O'Hara, Brian Keith, Steve Cochran, and Chill Wills.
 Based on the novel of the same name by A. S. Fleischman, the film is about an ex-army officer who accidentally kills a woman's son, and tries to make up for it by escorting the funeral procession through dangerous Indian territory.
 "The Deadly Companions" was Sam Peckinpah's motion picture directorial debut. Junior Bonner
Junior Bonner is a 1972 film directed by Sam Peckinpah and starring Steve McQueen, Joe Don Baker, Robert Preston and Ida Lupino.
 The film focuses on a veteran rodeo rider as he returns to his hometown of Prescott, Arizona, to participate in an annual rodeo competition and reunite with his brother and estranged parents.
 Many critics consider it to be the warmest and most gentle of Sam Peckinpah's films. The Wild Bunch: An Album in Montage
The Wild Bunch: An Album in Montage is a 1996 American short documentary film directed and edited by Paul Seydor.
 The occasion for the creation of this documentary was the discovery of 72 minutes of silent black-and-white 16 mm film footage of Sam Peckinpah and company on location in northern Mexico during the filming of "The Wild Bunch".
 Todd McCarthy described it as, "A unique and thoroughly unexpected document about the making of one of modern cinema's key works, this short docu will be a source of fascination to film buffs in general and Sam Peckinpah fanatics in particular."
 Michael Sragow wrote that the film is "a wonderful introduction to Peckinpah’s radically detailed historical film about American outlaws in revolutionary Mexico — a masterpiece that’s part bullet-driven ballet, part requiem for Old West friendship and part existential explosion.
 Seydor’s movie is also a poetic flight on the myriad possibilities of movie directing."
 Seydor and Redman were nominated for the Academy Award for Best Documentary (Short Subject). Bring Me the Head of Alfredo Garcia
Bring Me the Head of Alfredo Garcia (Spanish: "Tráiganme la cabeza de Alfredo García" ) is a 1974 Mexican-American action film directed by Sam Peckinpah, co-written by Peckinpah and Gordon Dawson based on a story by Peckinpah and Frank Kowalski, and starring Warren Oates. David Peckinpah
David Ernest Peckinpah (September 5, 1951 – April 23, 2006) was a television writer, producer and director.
 David was the nephew of legendary film director Sam Peckinpah and son of Denver "Denny" Peckinpah, a Fresno County Superior Court Judge.
 He was the writer and producer of several series including the cable TV shows "DEA", "Silk Stalkings", "Sliders" and "Beauty and the Beast."
 He also had a number of series in development at the time of his death. The Getaway (1972 film)
The Getaway is a 1972 American neo-noir crime film directed by Sam Peckinpah.
 The screenplay, written by Walter Hill, is based on the eponymous 1958 novel by Jim Thompson.
 Starring Steve McQueen, Ali MacGraw, Ben Johnson, Al Lettieri, Sally Struthers, Jack Dodson, Richard Bright and Slim Pickens, the film follows imprisoned mastermind robber Carter "Doc" McCoy (McQueen), whose wife Carol (MacGraw) conspires for his release on the condition they rob a bank in Texas.
 A double-cross follows the crime and the McCoys are forced to flee for Mexico with the police and criminals in hot pursuit.
 The film reunites McQueen and Peckinpah, having previously worked together in the commercially unsuccessful "Junior Bonner", released the same year.