Marco studied law at the University of Amsterdam. In 1993, he started working as a junior researcher at the Molengraaff Institute for Private law at Utrecht University. He wrote his Ph.D.-thesis on the contract to supply energy to consumers under the responsibility of professor Ewoud Hondius and successfully defended his thesis in 1998.
From 1997 to 2001 he worked as a researcher and lecturer of law at Tilburg University. From 2002 to 2004, he worked as asenior researcher and senior lecturer at the University of Amsterdam.
As of 2005 he is a professor at this University. In 2005 and 2006 he was Director of the Amsterdam Institute for Private law (AIP, currently the Centre for the Study of European Contract Law). From 2007-2009 he was chairman of the Department on Private Law. He regularly publishes in the fields of contract law, consumer law and European private law. He published in Dutch a book on standard contract terms in 2001, one on consumer sales law in 2004, his inaugural address on spontaneous harmonisation in contract law and consumer law in 2006, and a book on the sales regulation in the proposal for a Consumer rights directive in 2009.
In English, he published a book on the Review of the European Consumer acquis in 2008. He co-wrote the Principles of European Law on Service Contracts, published by Sellier in 2006. By the end of 2012, the Principles of European Law on Mandate Contracts (together with O. Bueno Díaz) will be published.
He co-edited a book on Collective redress in consumer law in 2007 (in English, with Willem van Boom, Rotterdam), a book on the proposal for a Consumer rights directive (in Dutch, with Martijn Hesselink, Amsterdam), another on the upcoming Optional instrument (in Dutch, with Martijn Hesselink, Aukje van Hoek and Arthur Salomons). Finally, he published a ‘preadvies’ to the Dutch Lawyer’s Association Vereniging voor Burgerlijk Recht on the enforcement of consumer law (with Willem van Boom).
Marco Loos has been a member of the Study Group on a European Civil Code; he has been the manager of the Study Group’s Working Team on Services charged with developing common European Principles for Service Contracts, and the team leader of the StudyGroup’s Working Team on Mandate Contracts (still to be published). He has also been an Advisor to the Working Team on Donation.
Finally, he is a member of the editorial board of the Dutch consumer law review Tijdschrift voor Consumentenrecht en handelspraktijken (since 2009 as editor-in-chief) and a part-time judge to the District Court of ’s-Hertogenbosch.
In 2010 and 2011, Marco headed a study on Digital Content Services for Consumers, commissioned by the European Commission.