Marek Prawda was Head of Delegation of the European Commission to Poland in 2016–2021. Earlier, in 2012–2016, he served as Permanent Representative of Poland to the European Union and prior to that he was Poland’s Ambassador to Sweden and Germany. In 1992–2016 he worked at the MFA: he was Deputy Director (1998–1999) and then Director (until 2001) of the Department of Western Europe as well as Director of the Secretariat of the Minister (in 2001 and in 2005–2006).

He is a lecturer at Collegium Civitas in Warsaw, the Paweł Adamowicz Civic School in Gdańsk, and the European University Viadrina in Frankfurt (Oder).

In the 1980s, Marek Prawda was active in the Solidarity Citizens' Committee and worked in the Polish Academy of Sciences (1979–1992), where in 1984 he defended his doctoral dissertation in sociology of work. He was also Secretary-General of the steering committee of the Polish-German Society (1991–1992). Since 2021, he has acted as expert for Team Europe Direct to the Delegation of the European Commission to Poland and has been a member of the Conference of Ambassadors of the Republic of Poland and of the Programme Council of Network PL, an association of Poles employed by international institutions. He was an adviser to Oleksandra Matviichuk, a Nobel Peace Prize laureate, and a business consultant. Since 2023, he has served as Vice-President of the Euro-Atlantic Association.

He was awarded the Grand Cross of the Order of Merit of the Federal Republic of Germany, the Order of Merit of the Land of Brandenburg, the Cordi Poloniae Medal of the Convent of Polish Organisations in Germany, and the Medal of the European Movement in Germany. He also received the Dialogue Award from the Board of Polish-German and German-Polish Societies and the Polonicus Award of the European Institute of Culture and Media, granted by the European Association of the Polish Diaspora in Germany, the Netherlands, and Belgium.

He speaks German, English, French, Russian, and Swedish.