Legal Team

William Byun


Practice Areas


  • London School of Economics
  • University of London, M.Sc.
  • University of Michigan, J.D.
  • University of Chicago, A.B.


  • New York


William I.Y. Byun is a specialist in renewable energy and climate change project development. He has worked for the past 25 years in Asia (Tokyo, Seoul, Jakarta, Singapore, Bangkok) in infrastructure investment and renewable energy and recognized by governments and the media as an expert in the field.

Previously, he founded one of Asia’s pioneer CER firms, as Managing Director of a US Fortune 500 company’s renewables and climate change division in Asia, and as the head of a US$ 100 million PE fund for energy infrastructure. He also served as the Managing Director of Renewables and Climate Change (Asia; Middle East) at AES Corporation, and Principal of an investment firm specializing in Asia related infrastructure.

William’s practice allows him to work closely with Asian state-linked investment funds whose interests are moving towards cleantech investment opportunities in the US. Throughout his career, he has been active in traditional law firm settings and also in an entrepreneurial capacity with respect to direct project development.

Currently, William also teaches a course in global business at California State University San Marcos.

William was also the first U.S. Fulbright Scholar in residence at the Ministry of Finance in Korea, and has degrees from the University of Chicago, University of Michigan, and University of London, in Economics, Law and Sociology.

Representative projects include:

  • 100 MW solar development in Japan
  • 15 MW biogas project in Thailand
  • Restructuring of investments in India and Korea
  • JV in Thailand
  • Assisted the controlling owners of the Korea Stock Exchange
  • Counseled biodiesel plant and on a potential bio-algae facility tied into their traditional 40,000 ha agricultural plantation in Singapore