Before becoming a trainee, he was a figure skater who competed in various competitions. He won silver at the Asian Figure Skating Trophy twice, during different years, and participated in the Korea Figure Skating Championship in 2018.
On June 1, 2020, Sunghoon was introduced as a contestant in the CJ ENM and Big Hit Entertainment's reality survival show I-LAND. On September 18, 2020, he ranked 6th place by global votes and became a member of the boy group ENHYPEN.
- I-LAND (Mnet, 2020) - contestant
- In I-LAND's first episode, he performed "The 7th Sense" by NCT U, along with Jay.
- His MBTI personality type is ISTJ.
- Prior to I-LAND, he trained for 2 years and 1 month.
- Kstar Live: Meet Park Sunghoon: Young Figure Skater That Shakes Hearts with His Soft Visuals
- @mnetiland on Twitter (June 1, 2020)
- Soompi: Announcing The Top 7 Of "I-LAND": The New Group ENHYPEN
- Soompi: "I-LAND" Premieres With Trainees Covering EXO, NCT, And More For Test As They Aim For Spots In New Group
- @mnetiland on Twitter: June 23, 2020 tweet