Prior to his debut, Heo studied in Sungkyunkwan University and completed a degree in acting.
Heo would go on to play supporting roles in dramas such as Snowdrop (2021); The Matchmakers (2023); Sweet Home Season 2 and 3 (2023–2024); and The Impossible Heir (2024), as well as movies like Night in Paradise (2020); Double Patty (2021); and I, the Executioner (2024).
[4][5][6] During that same year, Heo portrayed Ji Sang-woo, a warm-hearted psychiatrist and YouTuber who specialized in unsolved cases in When the Phone Rings.
[7][8] The drama itself was a commercial success and received positive reviews.
[10] Heo was cast in TvN drama When the Stars Gossip (2025), which was first broadcast on January 4, 2025.