from 2007 Judge at the Swiss Federal Administrative Court, His research focuses on the legal implications of the inclusion of environmental and social policies in public procurement practices. He has delivered an expertise on Green Public Procurement in Switzerland (2006) and issued a working paper on how to integrate social aspects in public procurement processes (2009, 4th version 2017). He is one of four co-authors of the standard reference work on the practice of public procurement in Switzerland (“Praxis des öffentlichen Beschaffungsrechts”, 3rd edition 2013).