About us Vivian Treu Studied Economics, degree lic. rer. pol. (University of Basel, 2001)Swiss certified tax expert (EXPERTsuisse, 2004)Languages: German, English and FrenchFrom 1999-2016 employed by an international auditing company (“Big Four”) in the tax department.Since 1.1.2017 partner with unlimited liability of Treu & Co (3rd generation). Peter Treu Swiss certified accountant (1974)Swiss certified tax expert (EXPERTsuisse 1984)Languages: German and EnglishSince 1974 partner with unlimited liability of Treu & Co (2nd generation). Susanne Treu Cantonal Commercial Diploma KHS BaselLanguages: German, French, English and SpanishSince 1989 partner with limited liability of Treu & Co.