Bob Williams works extensively with evaluators and organizational development organizations in Australia, Asia, USA and Europe. He is the chair of the American Evaluation Association (AeA) International Committee and the Systems and Evaluation Topical Interest Group (TIG). His website (http://www.bobwilliams.co.nz/¬ ) is a valuable source of techniques, methods, workshops and ideas; mostly generated from his own work and collaborations with others.