Professor Lamensch's research focuses on the impact of digitalisation on tax systems, in particular value-added tax systems.

She has been or is involved in several research projects with foreign partners on EU-China relations, VAT/GST compliance burden for companies around the world, corporate tax fraud, VAT collection management, value reconciliation and the taxation of financial transactions. 

Professor Lamensch is a regular speaker, trainer and/or chair at international events, conferences and workshops for academics, but also for the public and the private sectors. 

She is a member of several expert groups (European Commission, OECD, WCO, UN), the Technical Editor of the International VAT Monitor, a Member of the Board of Trustees of the Academy of European Law (ERA), a Member of the European Association of Tax Law Professors (EATLP) and general co-rapporteur for the 2020 EATLP Annual Congress.

She was awarded the 2015 Maurice Lauré Prize by the International Fiscal Association and the 2012 TEI Award for the best short publication on European and/or International Tax Law by the Institute for Austrian and International Tax Law and the Tax Executive Institute.