Krystyna Marty studied sinology, history and international law at the University of Zurich. Before joining the Federal Department of Foreign Affairs (FDFA), she was a delegate for the International Committee of the Red Cross (ICRC) in Sri Lanka and Bosnia and Herzegovina. She joined the diplomatic service in 1996 and served in various capacities at the FDFA, including at the Swiss embassy in New Delhi, India, the Swiss Agency for Development Cooperation (SDC), and the International Organisations Division of the Directorate of Political Affairs. From 2002 to 2007 she was deputy head of mission at the Swiss embassy in Tashkent, Uzbekistan. From 2007 to 2011 she worked at the Swiss embassy in Beijing, China, first as head of the trade and economics section and subsequently as deputy head of mission. From 2011 to 2016 she was the Swiss ambassador in Pristina, Kosovo. In 2016, the Federal Council appointed Krystyna Marty as deputy state secretary and deputy head of the Directorate of Political Affairs. From January to December 2020 she served as state secretary and head of the Directorate of Political Affairs ad interim. On 1st January 2021 she has started her assignment as Ambassador of Switzerland to the Russian Federation.
Krystyna Marty is married and has one son.