A former Commissioner and Member of the Board of the Hellenic Competition Commission (HCC), Dr. Komninos is currently a visiting fellow of the Centre for Law and Governance in Europe at University College London (UCL), and a visiting professor at the Université Catholique de Louvain (2020-2022) besides being a member of the Executive Committee of the Global Competition Law Centre (GCLC) at the College of Europe. He is a prolific writer on legal matters and often gives speeches and seminars on EU law, and is a non-governmental advisor to the International Competition Network (ICN). He has argued both of the only two  preliminary reference cases to the European Court of Justice (ECJ) from Greece in the realm of competition law. His practice focuses on complex cases of abuse of dominance, restrictive agreements and merger notifications, and he represents clients before the European Courts, the European Commission, national competition authorities, national courts and international arbitration tribunals.