American College of Tax Counsel, Board of Regents, 2024-present
Bloomberg Tax & Accounting, Senior Fellow & Special Consultant, 2023-present
Bloomberg BNA, Multistate Tax Advisory Board, 2000-present
New York University Institute on State and Local Taxation
Advisory Board, 2009-present
Co-Chair, 2016-2017
Alabama Law Institute, Member, 1993-present
Alabama State Bar Tax Section
Legislative Review Committee, Chair, 2005-present
Section Chair, 1988-1989
American Institute on Federal Taxation, Trustee, 1995-2017
Birmingham Business Alliance
Board of Directors, 2007-2010
Public Policy, Vice-Chair, 2007-2009
American Bar Association Section of Taxation
Pass-Through Entities Subcommittee, Chair, 2006-2018
Task Force on State Implications of New Federal Partnership Audit Rules, Co-Chair, 2016-2018
Business Council of Alabama
Tax & Fiscal Policy Committee, Chair/Vice-Chair, 1986-2011
Paul J. Hartman/Vanderbilt University SALT Forum, Advisory Board, 1996-2009
Institute for Professionals in Taxation (IPT)