In Seoul, South Korea, on June 21, 2002, He was given the nickname "Tom" since he grew up watching Thomas the Tank Engine.

Turned professional in 2017 at the age of 15; won the 2019 Northeast Amateur, becoming the tournament's youngest winner.

Won the 2022 Wyndham Championship, becoming South Korea's first PGA Tour winner.

Won the 2022 Asian Tour Championship, becoming the tournament's youngest winner.

The Official World Golf Ranking currently has him placed 13th. He is well-known for his long irons and putting.

He has three professional event victories, two of which were on the PGA Tour.

In ten PGA Tour tournaments, he has finished in the top ten.He is regarded as one of the world's most promising young golfers.

He has competed in the World Amateur Team Championship and the Eisenhower Trophy for South Korea.