Thomas served on the ISA Board in 2007.

Thomas Krall is a teacher of mathematics, sports and music at a comprehensive school. He is currently on a sabbatical. Chair of a stuttering self-help group in Duesseldorf, Germany, 1989-1991. Chair of the German stuttering association, 1992-1993. Member of ISA management committee,1995-1998. Chair of ISA board of directors, 1998-2001.