Marek graduated in Law from University of Westminster in London and Trnava University. Since 2012, after practising law in London, he has been working at the law firm Maple & Fish, which focuses on public procurement law, EU law, competition law, personal data protection, personal privacy, common law, and state aid. He also teaches public procurement law, state aid and common law at the Faculty of Law at Trnava University. He is a regular contributor to many professional journals on public procurement law and is a lecturer in seminars on public procurement law, European funds and personal data protection.