American Board of Trial Advocates, Riverside/San Bernardino Chapter, Marlatt, Pres. 2011.
Assn. of So. Calif. Defense Counsel, Wiesmann, Pres. 2012, Bd. of Dir. 2001-2008; Marlatt, Bd. of Dir. 1991-97; Montgomery, Bd. of Dir. 2009-Present. Members: Marlatt, Wiesmann, Montgomery, Beck, Grant, Faustino, DeBus, Janzen.
Defense Research Institute, Wiesmann, Member 2007-Present.