[1] He currently plays third on the Gangwon Provincial Office curling team skipped by Park Jong-duk.

[2] Jeong represented South Korea at the 2014 Pacific-Asia Junior Curling Championships with his team of Kim Seung-min, Oh Seung-hoon, Park Se-won and Noh Chang-hyun.

After going 6–2 through the round robin, the team lost to China's Wang Jinbo in the final 8–6, missing out on qualifying for the 2014 World Junior Curling Championships.

In 2020, Jeong skipped his team of Kim San, Park Se-won, Lee Jun-hyung and Kim Seung-min to victory at the 2020 Korean Curling Championships.

[4] Their win earned them the right to represent South Korea at the 2021 World Men's Curling Championship in Calgary, Alberta.