Jang played for the South Korea U20 team and won the bronze medal in the 1983 World Youth Championship.
[1] In 2002, he was reassigned to assistant under Seak Poh Leong before he became the club technical director thus seeing Jang back at the helms.
He left the club after the 2002 season has ended On 10 April 2003, Jang was appointed as head coach at Balestier Khalsa.
[4] On 19 July 2012, it was announced that Jang will take over his former team Perak FA's head coach position from Norizan Bakar on an interim basis until the end of the 2012 Malaysia Cup campaign.
[5] His spell with Perak was a disappointing one, recording only one win, while suffering three draws and two defeats in six Malaysia Cup group stage matches, failing to qualify to the quarter-finals.