Ha Seok-jin is a South Korean actor. He is best known for his roles in TV drama series such as Radiant Office (2017), Drinking Solo (2016), Shark (2013), and 4 Legendary Witches (2014), for which he received two nominations for the Excellence Award at the 2014 MBC Drama Awards and the 4th APAN Star Awards.

Radiant Office is a 2017 South Korean television series starring Go Ah-sung and Ha Seok-jin. The series is written by a rookie screenwriter who won the 2016 MBC TV Drama Screenplay Competition in Miniseries category. It aired on MBC from March 15 to May 4, 2017 on Wednesdays and Thursdays at 22:00 (KST) for 16 episodes.