Located In
Des Moines, Iowa

Partners Located In


  • University of Iowa College of Law, J.D., with distinction, 1995

  • University of Iowa, B.A., Political Science, Attended 1992-1993
  • The George Washington University, International Affairs and Political Science, Attended 1987-1990

Memberships & Associations

  • National Association of Charitable Gift Planners
  • Mid-Iowa Planned Giving Council, Past President
  • International Association of Advisors in Philanthropy
  • Christian Legal Society
  • Fellow in Charitable Estate Planning (FCEP), Charitable Estate Planning Institute
  • Charitable Estate Planning Institute, Dean, 2017-Present
  • Charitable Estate Planning Institute, Faculty, 2012-Present
  • Iowa Bar Association
  • Illinois Bar Association
  • Nebraska Bar Association
  • Ruth Harbor Pregnancy Center, Board Member
  • Habitat for Humanity of Iowa, Past Board Member and President


  • Hagenow & Gustoff LLP, Managing Partner, 2009-Present
  • BrownWinick, Attorney, 2006-2009

  • Believers Stewardship Services, Inc., General Counsel, 2004-2006

  • Robinson, Pluymert, Piercey, MacDonald & Amato, Attorney, 2001-2002


Bill has extensive experience as an attorney working in estate planning, family business transactions, nonprofit organizations, and related areas.  Bill serves as one of the primary planning attorneys for Thompson & Associates while providing general guidance on the legal issues and planning processes of the company.

Bill’s legal career began in 1995 and, in addition to his years in private practice, included serving nearly four years as general counsel for a national nonprofit organization dedicated to estate planning, planned giving, and assisting other nonprofit organizations with planned giving and tax issues. 

Bill has assisted businesses and individuals from around the country with their transactional, real estate, and estate planning matters. Bill has worked on transactions and estates ranging from the very modest and simple to those complex and in excess of $1 billion to help clients minimize or eliminate taxes and administration expenses, meet their philanthropic goals, and plan for the passing of business and personal assets to future generations. 

Each year Bill attends and teaches several hours of advanced and comprehensive continuing legal education courses focused on estate planning, nonprofit organizations, and planned giving.  He has been a frequent speaker at locations around the country for both professional and nonprofessional groups on estate planning and nonprofit organization topics, and he has written several articles and brochures on such topics. 

Bill serves as Dean and a member of the faculty of the Charitable Estate Planning Institute (a 501(c)(3) public charity formed by a group of Thompson & Associates colleagues in 2012 that provides top-level education on charitable estate planning for development staff, gift planning officers, and professional advisors). 

Bill is active with the Iowa State Bar Association, including serving on the Nonprofit Corporation Committee of the Business Law Section.  His past bar association activities have also involved sections on Wills, Trust and Probate Law and on Taxation Law, the Committee on Services to the Elderly, and committees for Professionalism and for Public Relations of the Legal Profession. 

Bill lives in Des Moines with his wife and four children (three still at home).  He is active in local political and civic activities, including current and past service on the boards of directors and in other leadership capacities with various nonprofit organizations, local business leagues, and his local church.