First appearing on Samsung KHAN's lineup in early 2007, JangBi quickly became the star player of the team, with more ace match and finals appearances than anyone else on his team during the 2008-2009 season. Known for having arguably the best PvT in Korea, Jangbi holds the ELO peak for the Protoss vs Terran matchup and is generally considered a favorite against any Terran he faces. JangBi has long been in the shadow of his teammate Stork, who was seen as the star player of KHAN for a long time until the slump he suffered following his Incruit OSL victory. Some joke that JangBi still is in Stork's shadow; Stork was long known for always finishing 2nd in tournaments, and JangBi had earned 3 silver medals in the span of 1 season. In televised matches between the two, however, Jangbi is undefeated with five victories. Following his second consecutive MSL silver medal in the 2009 Lost Saga MSL, JangBi appeared to lose his previous good form and fell into a slump.

In round 1 of the 09-10 Proleague, JangBi performed poorly, finishing with stats of 1 win and 5 losses, including one ace match defeat to Effort. Despite his poor proleague performance, he qualified for the round of 32 in the 2009 Nate MSL which he passed 2-0 with victories over Firefist and Ruby for a spot in the round of 16. He was set to play Stats in his round of 16 matchup. For this encounter JangBi thumbed-down Ultimatum. Despite winning the opening game of the series with his Proxy DTs beating Stat's DT rush, Jangbi's eventually fell short against Stats' solid style. He dropped two games in a row and was knocked out 1-2.

He also qualified for the EVER 2009 OSL but was knocked out by Kwanro in the round of 36.

Since Mid 2010, JangBi had been playing poorly and dropped out of MSL and OSL play. In Mid 2011, there has been a resurgence: In Proleague, he started R6 with a 6-game winstreak, including a win over the PvP specialist Horang2. After that, he lost four games in a row, including three unfortunate losses in the playoffs against Woongjin Stars.