For last 25 years, he developed his career in business development and investment at POSCO(World Top 5 Steel Maker) as an energy investment manager and KPMG as a regional head of Climate Change and Sustainability of KPMG Asia Pacific to lead 12 countries and direct projects of investment/strategy/policy such as regulation framework, compliance strategy, investment advisory, corporate strategy, and social responsibility consulting, and now he leads environment & energy research center at Kim & Chang(the biggest law firm in Korea) as well as an adjunct professor of Korea University in Earth & Environmental Sciences. Also, based on his comprehensive experience from engineering to financing as well as from theory to execution in this field, he was a focal member of the advisory board of Asia Clean Energy Fund, a member of the external advisory group for the World Bank, a member of Private Sector Advisory Committee of GGGI, a vice chairman of Korea ∙ Mongolia Economics & Business Association, an external technical expert for GCF, a member of expert committee for the President of KOICA, and a Board member of International Emission Trading Association(IETA). Now, he is a Board Member of Yido(O&M Investment Platform) as well as a senior advisor for the Korean Governments and corporates. With frequent publications, media exposure, speech & panel at major global conferences such as B4E(Business for Environment), Carbon Expo(Innovate 4 Climate), Carbon Finance, and Asia Clean Energy Forum as a prominent Asian speaker, he teaches in executive MBA in many renowned universities to always reinforce the relationships with the decision makers from private sector.