John Tan focuses his practice on internal investigations and corporate compliance on behalf of clients in the life sciences and healthcare, automotive, and energy sectors. His work includes counseling companies on FCPA and compliance investigations, responding to government inquiries, and developing compliance programs. He also handles anti-corruption due diligence for corporate transactions.

Prior to joining Arnold & Porter, Mr. Tan was a partner in private practice, leading a cross-border team of attorneys in conducting investigations, compliance due diligence, and proactive compliance reviews across Asia. He also previously served as the China Regional Compliance Director for Pfizer from 2010 to 2012.

Mr. Tan began his career as a public defender in the District of Columbia, where he handled numerous bench and jury trials and argued before the court of appeals five times. Mr. Tan has lived in Shanghai since 2005 and is fluent in Mandarin.


Dinner and Roundtable Discussion for the Life Sciences Industry
Arnold & Porter Roundtable Discussion, Shanghai, China


Chambers Global
China Corporate Investigations/Anti-Corruption
Chambers Asia-Pacific
China Corporate Investigations/Anti-Corruption
China Life Sciences
LMG/Euromoney Expert Guides
White Collar Crime


  • JD, Georgetown University Law Center, 1998
  • Massachusetts Institute of Technology, 1993, Robert A. Muh Award for Undergraduate Research
  • District of Columbia
  • Virginia
  • Superior Court of the District of Columbia, The Honorable A. Franklin Burgess
  • Chinese (Mandarin)

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