Diane Diel

126 North Jefferson Street
Milwaukee, 53202
United States
Member since 2004
Membership Type: IACP



As a past president of IACP, I am delighted to continue to work to establish consistently excellent Collaborative Practice worldwide. I served as a member of the Ethical Standards Rewrite Task Force, and currently sit on the IACP Ethics and Standards Committee.

Area(s) of Practice: Collaborative Law, Family Law, Mediation
License(s): Member, State Bar of Wisconsin since 1976

Professional Activities

Member, IACP Standards and Ethics Committee (2004-) Member, Wisconsin State Bar Ethics Committee (2014-2020) Commissioner, Milwaukee Harbor Commission (2014-) President, IACP (2010-2011) ~Past President, IACP (2011-2012) ~Member, IACP Board of Directors (2006-2012) ~Member, IACP Ethical Standards Rewrite Task Force (2015-17) ~Co-Chair, IACP Standards & Ethics Committee (2017-18) Chair (2002) Collaborative Family Law Council of Wisconsin ~Training Chair, (2004-2006) Collaborative Family Law Council of Wisconsin ~President, State Bar of Wisconsin (2008-2009) ~Past Member, Wisconsin State Bar Board of Governors, Professional Ethics Committee & Trust Account Rules Committee Member, Wisconsin Access to Justice Commission (2017-) Association of Women Lawyers, Milwaukee, Wisconsin, President in 1985, Founder's Award, 2010 Association of Women Lawyers Foundation, Milwaukee, Wisconsin, Treasurer, (2007-2019) and current Board member

Undergraduate Education

University of Wisconsin-Eau Claire, B.A., 1973

Professional Education

Unviersity of Wisconsin, J.D., 1976


I received my first Interdisciplinary Training in Collaborative Practice in January, 2001. From that training forward, I have committed myself to the development of my own Collaborative Practice and to the service of both the IACP and my local practice group, the Collaborative Family Law Council of Wisconsin. I am honored to have served IACP as its President in 2010-2011.