Marcin Przydacz was born in Wielun on 26 June 1985. A graduate of the Faculty of Law and Administration of the Jagiellonian University, he also studied international relations and philosophy at that university. As a scholarship holder he studied at the Sapienza University in Rome, the University of Mesina, and the „Kyiv–Mohyla Academy” National University in Kyiv. He also graduated from the Italian and European Law School at the University of Warsaw.

He completed advocate training at the Krakow District Bar Council, and passed the bar exam in 2015.

Between 2010 and 2014, he collaborated with the Jagiellonian Club as an international relations analyst. At the same time, he was involved with the Republic Foundation Centre of Analysis. From 2012 to 2015, he was a lecturer at the Pontifical University of John Paul II in Krakow, and from 2013 to 2015, he was president of the board of the Politics and Diplomacy Foundation, a think–tank.

Between 2015 and 2019, he served as deputy director of the International Policy Bureau at the Chancellery of the Polish President. Subsequently, from 2019 to 2023 he served as Secretary of State in the Ministry of Foreign Affairs in charge of security, American, Asian and Eastern policies.

On 13 January 2023 the President of the Republic of Poland appointed Marcin Przydacz to the position of Secretary of State in the Chancellery of the President of RP, Head of the International Policy Bureau in charge of the substantive supervision of the works of the Bureau.