American Bar Association:

Co-Chair National Security Law Committee of the International Section (2016-2019)

Vice Chair International Arbitration Committee of the International Section (2011-2013)

Vice Chair National Security Law Committee of the International Section (2002-05 and 2011-2015)

Former Chair of Federal Rules of Civil Procedure subcommittee of the International Litigation Committee of the Litigation Section

 American Bar Foundation:

• Life Fellow

Boston Bar Association:

• Chair of the International Section (1994-96)
• Chair of the International Arbitration Committee (1990-92)  

Boston International Arbitration Council -- Co-Chair of the Board of Directors (2018 to date)

College of Commercial Arbitrators:

• Fellow (since 2008)
• Member of International committee 
• 2015-16 Co-Chair of the Law Firm Education Committee

Chartered Institute of Arbitrators:

• Fellow (since 9/2/85)(FCIArb)
• Chartered Arbitrator (since 10/27/08)(C.Arb)

International Law Association: 

• 1989 to date: American Branch delegate to the International Arbitration Committee
• 1985 to 1989: Chairman American Branch Arbitration Committee

National Academy of Distinguished Neutrals

• Member

Silicon ValleyArbitration and Mediation Center : Listed as one of the World's Leading Technology Arbitrators

The Best Lawyers in America -- Listed repeatedly in International Arbitration (Commerical & Governmental) 

The 2021 and 2022 Corporate International Magazine Global Awards:  "Arbitration Lawyer of the Year in Massachusetts"

The Euromoney Expert Guides:  Listed repeatedly in International Arbitration