Chair, Publications Strategy Development Committee, System Dynamics Society. 2014-2016.
Chair, Nominations Committee, System Dynamics Society. 2013
President, System Dynamics Society. 2012
Managing Editor, System Dynamics Review. 2007 – 2011.
Committee for Oversight and Assessment of U.S. Department of Energy Project Management. National Research Council. The National Academies. member, appointed, 2000 – 2004.
System Dynamics Winter Camp. Co-Executive Director, appointed. 2005. Executive Committee. member, appointed. 2013, 2011, 2009, 2007, 2005, 2003. Austin, TX.
Conferences of the International System Dynamics Society, paper review committees, member, 2001 – 2004. invited.
International System Dynamics Society, nominating committee for Policy Council and Society Officers, 2000 – 2002, member, appointed.
ASCE National Student Steel Bridge Competition, May 20-21, 2000, Marshall, appointed.
International System Dynamics Society, Bergen, Norway. 1999 – 2000, Co-Program chair, 2000 conference, appointed.
System Dynamics Society, Policy Committee, 1998 – 2000, member, elected.
European Academic Software Awards, Juror, 1998, appointed.