He is also called Kim Do-hoon 753 to distinguish him from another South Korean golfer also called Kim Do-hoon, 753 being his membership number at the Korea Professional Golfers' Association.

He won twice on the Korean Tour, the 2010 Tomato Savings Bank Open and the 2013 Munsingwear Matchplay Championship.

In December 2006, Kim was part of the South Korean team that won the gold medal in the men's team event at the 2006 Asian Games.

He had two wins on the Korean Tour, the 2010 Tomato Savings Bank Open and the 2013 Munsingwear Matchplay Championship.

[1][3] His best season was 2013 when he finished fourth in the tour points list and third in prize money.