East West Bancorp, Inc. and East West Bank, a global bank based in California
- Chief Executive Officer and Chairman of the Board since 1992
- President (1992 – 2009)
Seyen Investment, Inc., a private family investment business
- President (1990 – 1992)
Deloitte & Touche LLP, an accounting firm
- Certified Public Accountant (1980 – 1990)
- East West Bancorp, Inc. since 1992; also Chairman since 1992
- PacifiCare Health Systems, Inc. (2003 – 2005)
- ESS Technology, Inc. (1998 – 2004)
- Trustee, University of Southern California since 2014
- Trustee, Academy Museum of Motion Pictures since 2018
- Chair, Asia-Pacific Economic Cooperation Business Advisory Council since 2022
- Director of the following nonprofit entities and government organizations: Federal Reserve Bank of San Francisco – Los Angeles Branch (2005 – 2011); California Bankers Association (previously 2002 – 2011, 2016 – 2017); Chairman, Committee of 100 (2011 – 2014); The United Way of Greater Los Angeles (2006 – 2014); Pacific Council on International Policy (2010 – 2013); and Los Angeles' Mayor's Trade Advisory Council as Co-Chair (2009 – 2011)
