1979. 1 Daewoo Engineering & Construction Co.
1979. 1 ~ 1983. 3 Worked for domestic construction projects (Korea Education Insurance, Korea Military Academy)
1983. 4 ~ 1990. 2 Worked overseas (Libya, London)
1990. 3 ~ 1993. 9 Overseas Costs Team, Overseas Contracts Team, Domestic Construction Manager
1993.10~ 1995.12 Worked overseas (Malaysia)
1996. 1 ~ 1998.12 Domestic Construction Manager
1999. 1 ~ 2002. 3 Director of the Construction and Development Team
2002. 4 ~ 2003.12 Standing Committee Member and Head of Construction and Development Teams
2004. 1 ~ 2005.12 Standing Committee Member and Head of Residential Development Team
2006. 1 ~ 2006.12 Standing Committee Member and Head of the Investment Management
2007. 1 ~ 2007.11 Standing Committee and Head of the Residential, Redevelopment/Reconstruction
2007.12~ 2010.11 Chief of the Construction Headquarter
2010.12~ 2011.11 Chief of the Development Headquarter
2012. 3 ~ 2016. 6 CEO, Kumho Industrial Co
2016.12~ 2018. 5 CEO, Hanyang Co., Ltd.