Jeong Jae-eun attended and was one of the first graduates of the School of Film, TV and Multimedia of the Korea National University of Arts.
[2][1] Jeong's first feature film was Take Care of My Cat (2001), a story of friendship and growth among five young women in their twenties.
In 2003 Jeong made a short titled The Man with an Affair which was included in If You Were Me, an omnibus project for human rights.
[6] Her second feature was The Aggressives (2005), a film about urban Seoulite youngsters passionate about inline skating, which was also invited to the Generation section of the Berlinale.
[11][12][13] In 2021 she was selected as Jury member for New Currents Award in 26th Busan International Film Festival to be held in October.