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 CJEU (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;
. 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.