Ing. Rastislav Trnka graduated from the University of Economics in Bratislava, Faculty of Business Administration based in Košice. After graduating, he was involved in business and later he worked as a project manager at Pavol Jozef Šafárik University in Košice.
He has been working in public administration since 2010. He was deputy mayor of Košice – Old Town district. He later became a member of the Košice Self-governing Region, where he was one of the most active elected representatives of the region. He has been President of the Košice Self-governing Region since 2017, winning the election as an independent candidate.
He is also involved in foreign policy. In 2018, he became a member of the European Committee of the Regions, the Commission for Territorial Cohesion Policy and EU Budget (COTER) and also the Commission for the Environment, Climate Change and Energy (ENVE). Since 2020, he has been Vice-President of the ENVE Commission at the European Committee of the Regions in Brussels.