Are both Donald Cammell and Andrzej Bartkowiak both directors?
yes
Donald Cammell
Donald Seaton Cammell (17 January 1934 – 24 April 1996) was a Scottish film director who has a cult reputation thanks to his debut film "Performance", which he co-directed with Nicolas Roeg.
Andrzej Bartkowiak
Andrzej Bartkowiak, A.S.C. (born 6 March 1950) is a Polish cinematographer and director.
Performance (soundtrack)
Performance is a 1970 soundtrack album to the film "Performance" by Donald Cammell and Nicolas Roeg.
 It features music from Randy Newman, Merry Clayton, Ry Cooder, Jack Nitzsche, Buffy Sainte-Marie, The Last Poets and Mick Jagger. Wild Side (1995 film)
Wild Side is a 1995 film co-written and directed by Donald Cammell.
 It went straight to video and stars Christopher Walken, Joan Chen, Anne Heche, and Steven Bauer. Performance (film)
Performance is a 1970 British crime drama film directed by Donald Cammell and Nicolas Roeg, written by Cammell and photographed by Roeg.
 The film stars James Fox as a violent and ambitious London gangster who, after carrying out an unordered killing, goes into hiding at the home of a reclusive rock star (Mick Jagger of The Rolling Stones, in his film acting debut). White of the Eye (film)
White of the Eye is a 1987 British thriller film directed by Donald Cammell and starring David Keith and Cathy Moriarty.
 It was adapted by Cammell and his wife China Kong from the 1983 novel "Mrs. White", written by Margaret Tracy (pseudonym of the brothers Laurence and Andrew Klavan). China Kong
China Kong (born 1960) is an American actor, writer, and producer.
 She is the widow of director Donald Cammell, having met him when she was 14 years of age and he was 40 years of age in 1974.
 After having an affair, the two would wed 4 years later in 1978. Demon Seed
Demon Seed is a 1977 American science fiction–horror film directed by Donald Cammell.
 It stars Julie Christie and Fritz Weaver.
 The film was based on the novel of the same name by Dean Koontz, and concerns the imprisonment and forced impregnation of a woman by an artificially intelligent computer.
 Gerrit Graham, Berry Kroeger, Lisa Lu and Larry J. Blake also appear in the film, with Robert Vaughn uncredited as the voice of the computer. The Touchables (film)
The Touchables is a 1968 British film directed by Robert Freeman and written by Ian La Frenais from a story by Donald Cammell.
 It stars Judy Huxtable, Esther Anderson and James Villiers. Doom (film)
Doom is a 2005 American science fiction action horror film directed by Andrzej Bartkowiak and written by David Callaham and Wesley Strick, loosely based on the video game series of the same name created by id Software.
 Starring Karl Urban and Dwayne Johnson, the film follows a group of marines in a research facility on Mars.
 After arriving on a rescue and retrieval mission after communications ceased, the marines soon battle genetically engineered monsters plaguing the facility.