[2] In 2007, Kim Jong-Soo made his film debut with an appearance in Secret Sunshine, directed by Lee Chang-dong.

Kim has been recognized through his supporting roles in television dramas such as Six Flying Dragons, The Producers, Three Days, Misaeng: Incomplete Life, Pied Piper, Kingdom, The Emperor: Owner of the Mask, and Snowdrop.

Starting from 2016, he embarked on a series of film projects, starring in The Prosecutor's Abduction, Seondal: The Man Who Sells the River, Asura: The City of Madness, Tunnel, Horror Stories 3, One Way Trip, The Map Against the World and Insane.

In 1984, Kim joined the Whales Theatre and began his career in 1985 directing plays such as Beautiful Autograph, Tropical Thief Story, and My Lime Orange Tree.

[5][6] Most recently, he has been featured in the films: The Map Against the World (2016), Asura: The City Of Madness (2016), Our Love Story (2016), Tunnel (2017), Drug King (2018) and Money (2019).