He has served as the Chairman of the Libertarian National Campaign Committee, Vice Chair of the Libertarian Party (Libertarian National Committee) 2010-12. Past State Chairman of the Libertarian Party of Indiana, 2000-07. Member of Libertarian National Committee, 2001-06, 2010-12. Chairman of the Indiana Public Defender Commission. Mark is a shareholder in the law firm Thrasher Buschmann & Voelkel, P.C.