At Land (1944) is a 15-minute silent experimental film written, directed by, and starring Maya Deren.
 It has a dream-like narrative in which a woman, played by Deren, is washed up on a beach and goes on a strange journey encountering other people and other versions of herself.
 Deren once said that the film is about the struggle to maintain one's personal identity.
Teiji Ito (伊藤貞司 , Itō Teiji , January 22, 1935 – August 16, 1982) was a Japanese composer and performer.
 He is best known for his scores for the avant-garde films by Maya Deren.
 The independent filmmaker, Barbara Hammer, continues to promote and educate the world about both Teiji and his wife, Maya Deren.
Chao-Li Chi (; April 5, 1927 – October 16, 2010) was a Shanxi-born actor and dancer who worked extensively in American television, including his best known role as Chao-Li, the faithful majordomo and chauffeur of Jane Wyman's character in "Falcon Crest".
 Additionally, his film credits include "Big Trouble in Little China", "The Joy Luck Club", "The Nutty Professor", "Wedding Crashers" and "The Prestige".
 He was featured in the short film by Maya Deren, "Meditation on Violence", in 1948.
Meshes of the Afternoon (1943) is a short experimental film directed by wife-and-husband team Maya Deren and Alexander Hammid.
 The film's narrative is circular and repeats several motifs, including a flower on a long driveway, a key falling, a door unlocked, a knife in a loaf of bread, a mysterious Grim Reaper–like cloaked figure with a mirror for a face, a phone off the hook and an ocean.
 Through creative editing, distinct camera angles, and slow motion, the surrealist film depicts a world in which it is more and more difficult to catch reality.
The documentary In the Mirror of Maya Deren ("Im Spiegel der Maya Deren", 2002) is a film about avant garde filmmaker Maya Deren (1917-1961) by Austrian film maker Martina Kudlacek.
 It is based on the biography "The Legend of Maya Deren".
Filmworks X: In the Mirror of Maya Deren features a score for film by John Zorn.
 The album was released on Zorn's own label, Tzadik Records, in 2001 and contains music that Zorn wrote and recorded for the documentary film "In the Mirror of Maya Deren" on the life and work of Maya Deren directed by Martina Kudlácek.
Ted Post (March 31, 1918 – August 20, 2013) was an American director of film and television.
 Highly prolific, Post directed numerous episodes of well-known television series including "Rawhide, Gunsmoke," and "The Twilight Zone" as well as blockbuster films such as "Beneath the Planet of the Apes" and "Magnum Force".
Maya Deren (April 29, 1917 – October 13, 1961), born Eleanora Derenkowskaia (Russian: Элеоно́ра Деренко́вская ), was a Russian-American filmmaker and one of the most important American experimental filmmakers and entrepreneurial promoters of the avant-garde in the 1940s and 1950s.
 Deren was also a choreographer, dancer, film theorist, poet, lecturer, writer and photographer.
Illusions & Mirrors is a 2013 short film directed by Iranian-born American artist and filmmaker Shirin Neshat.
 The film, shot in black-and-white, stars Tarek Aylouch, Michael Markiewicz, and the Israeli-born American actress Natalie Portman.
 The film was commissioned by Dior, for which Portman is a spokesmodel, for the Miss Dior Expo at the Grand Palais, Paris.
 Shirin Neshat said that the film is a tribute to the black-and-white silent films made by such surrealist filmmakers as Man Ray, Jean Cocteau, Luis Buñuel, and Maya Deren.
The American Film Institute Award for Independent Film and Video Artists, subtitled and generally known as the Maya Deren Award, was an award presented to filmmakers and video artists by the American Film Institute to honor independent filmmaking.
 Named for the avant-garde experimental film artist Maya Deren, it was given from 1986 through 1996.

Question:  Were Ted Post and Maya Deren both in the film industry?
Answer: yes