[1] He graduated from Seoul National University with a degree in metallurgical engineering, and afterwards worked in the Office of the Prime Minister as an economist.
According to Ministry of Commerce, Industry and Energy regulations, the president of a government-owned company is required to be a South Korean citizen.
[6] A notice confirming his loss of U.S. citizenship appeared in the Federal Register as required by the Health Insurance Portability and Accountability Act in October 1998.
A November 1999 report by government auditors gave him credit for management reforms which led to some improvement in operational efficiency.
[12] Jang was named to an endowed chair professorship at Hanyang University's Graduate School of Industrial Economics in August 1999.