Marc Steiner holds a Master of Law from the University of Ba­sel and is ad­mit­ted to the bar. 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). Marc Steiner has been appointed as a Judge to the Swiss Federal Admini­strative Court in 2007 (2nd Division, primarily in charge of economic matters including pub­lic procure­ment and compe­tition). His comparative approach has been stimu­lated especially during two internships at the ECJ (1996 and 2008). 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). Further­more, Marc Steiner was invited to act as an expert during the public hearing of the Internal Market and Consumer Protection Committee of the European Parliament on "Modernisation of Public Procure­ment" (May 2011; rapporteur: Heide Rühle). He also contri­buted to the revised UNEP-Guidelines on the Implemen­tation of Sustai­nable Public Procurement (2012). In September 2015 he was invited as a speaker to the WTO Government Procurement Agreement Sympo­sium (pre­sen­tation; cf. publi­cation on Green Public Procure­ment) and in February 2017 to the WTO Sym­posium on Sustainable Pro­cure­ment (presen­ta­tion; report). His latest article (together with Elisabeth Lang) reads as follows: Public Pro­cure­ment Regulation: Fostering Market Access and Simultaneously Preventing Corruption - A Swiss Per­spec­tive. Marc Steiner is a member of the Advisory Board of Trans­parency International (Swiss Chapter) focu­sing on integrity in the government pro­cure­ment process and at the same time a member of the Scientific Advisory Board of swisscleantech, the Swiss association for stake­holders in the green economy, dealing with sustainable (public) procure­ment issues.