Peter studied law at the HSG (University of St. Gallen) and received his PhD with a dissertation on international tax law. After two years as an assistant at the Institute of Finance and Financial Law (IFF) and postgraduate studies at the New York University School of Law (LL.M. in Taxation), he gained experience for about 10 years in a large consulting firm and as a head of department at the Cantonal Tax Office of St. Gallen before setting up his own consulting firm as a tax law consultant in 1999. His consulting focus lies in the tax law support of national and international projects (business succession, restructuring, etc.), second opinions in complex tax matters as well as appeal proceedings. In addition, Peter has been actively involved in continuing education in tax law for over 20 years, always with a focus on professional development for tax experts. In this context, he has held lectureships at various universities and is now actively involved in the master's program at the Law School of Kalaidos University of Applied Sciences and as President of the Institute for Swiss and International Tax Law (ISIS). In addition, he leads ISIS continuing education seminars and regularly publishes on tax law (textbook, commentaries, essays).