Pierre-Alain Guillaume is a tax partner with Walder Wyss. He specializes in Swiss and international taxation. His mission is to reduce our clients’ tax burden to the bare minimum and to prevent any tax risk at their level, while complying fully with applicable tax rules. He handles matters related to direct taxes (individual income tax, wealth tax, corporate income tax, capital tax) as well as to indirect taxes (VAT, withholding tax, gift tax and inheritance tax). He provides the following services on a frequent basis: tax planning and tax optimization; wealth reorganization (trust structure, etc.); inheritance planning; negotiating and obtaining tax rulings with tax authorities; corporate restructuring; tax due diligence; analyzing and preventing tax risks; preparing tax audit; representing individual and corporate clients in tax audits (tax recapture and tax investigations procedures); representing individuals and corporate clients in tax litigations (claims in front of the tax administrations, appeal procedure in front of tax courts); representation of clients in criminal tax procedures (so-called special tax investigations); representation in mutual assistance procedures (exchange of tax information between States).

Pierre-Alain Guillaume graduated from the University of Lausanne (lic. iur. In 1991, LLM in 1992). He was admitted to the Bar in 1995. He has been specializing in tax matters since 1994. Prior to joining Walder Wyss in 2019, he was a partner with successively two Swiss law firms.

Pierre-Alain Guillaume speaks French and English. He is registered with the Geneva Bar and is admitted to practice in all Swiss cantons. He is a member of the Geneva Bar Association, the Swiss Bar Association, the International Fiscal Association, and the Geneva Business Law Association.