Since April 2012 Jaap is Assistant Professor at the Department of Private Law at the University of Amsterdam Law School. He has been teaching since 2005, including courses in European Contract Law (MA); Contract Law Theory (BA); Litigation (BA) and Introduction to Legal Theory (BA). He previously worked as judicial clerk at the Amsterdam Court of Justice, sector Private and Business Law and as professional support lawyer in corporatelaw, banking and finance and litigation.
In April 2006 Jaap joined the Centre for the Study of European Contract Law (CSECL) and started his interdisciplinary PhD research on the impact of Europe's multilingualism on the harmonization of private law in the EU. He focusses on issues in legal translation, legal interpretation, comparative law and philosophy of language. In 2007 Jaap was Visiting Research Fellow at the Columbia University School of Law in New York City, for which he received the NACEE Fulbright Scholarship.
Jaap is further associate editor of the double-blind, peer-reviewed e-journal on Language and Law; and volume editor of the comparative legal study of contract interpretation in Europe, under of the Common Core of European Private Law project. In addition Jaap has an MA degree in Philosophy, with a specialization in philosophy of language and legal theory.
In 2007 Jaap founded the Amsterdam Circle for Law & Language (ACLL). The ACLL is a platform and meeting point for scholars and practicioners who are interested in the methodological and emperical relations between law and language. It explores and aims to offer an exchange of ideas in the fields of inter alia law and multilingualism, legal translation, jurisprudence, philosophy of language, comparative law, and argumentation theory. For this purpose the ACLL organizes frequent presentations and lectures by prominent international scholars.
Together with the CSECL, the ACLL hosted the conference on "The Role of Legal Translation in Legal Harmonisation" on Friday 21 January 2011 in Amsterdam . The speakers included key representatives of EU Institutions and leading scholars in the fields of legal translation studies, comparative law and European private law.