Peter studied law at the HSG (University of St. Gallen) and earned his doctorate with a thesis 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 the head of department at the Cantonal Tax Office of St. Gallen, before setting up his own consulting firm as a tax consultant in 1999. His main focus is on tax law advice on national and international projects (corporate succession, restructuring, etc.), second opinions on complex tax issues and appeal proceedings. In addition, Peter has been actively involved in tax law training for over 20 years, whereby the focus has always been on the professional training of tax experts. In this context, he has held teaching positions 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). He also leads ISIS training seminars and regularly publishes on tax law (textbook, commentaries, articles).