In 2007, he won the bronze medal in the foil team event at the World Fencing Championships in Saint Petersburg, Russia.

Choi qualified for the 2008 Beijing Olympics for the men's individual foil competition.

[2] On August 13, 2008, he had a 15–14 loss to the eventual silver medalist Yuki Ota of Japan in the round of 16.

Choi then participated in the 2012 London Olympics and on July 31, 2012, he lost to Alaaeldin Abouelkassem in the semi-final, but beat Andrea Baldini in the bronze medal match to finally capture the bronze medal.

This biographical article related to fencing in South Korea is a stub.