He competed in the trap event at the 1960 Summer Olympics.
[1] The Korean Sport & Olympic Committee initially chose Sim to represent the country in the trap event at the 1956 Summer Olympics, but in the end he did not participate.
[2][3] He worked for Daidong Transport,[a] and represented the company at South Korea's Workplace Defense Shooting Championships[b] in 1959, coming in first place in first place in the individual division.
[5] In 1965 when the Korean Shooting Association[c] split off separate associations for rifle and trap shooting, he became a member of the board of directors of the trap shooting association.
[7] He was one of the founding members of the Gwangju Central Fishing Association[d] in 1967, and became its first vice-president.