Dariusz Rosati graduated from the Faculty of International Trade at the SGH Warsaw School of Economics in 1969 and immediately afterwards started working there as an assistant.

He is a supporter of a united Europe, the author of numerous publications on European integration and the rector of Lazarski School of Commerce and Law in Warsaw (Wyższa Szkoła Handlu i Prawa im.

He was the Minister of Foreign Affairs in the cabinets of Józef Oleksy and Włodzimierz Cimoszewicz (both SLD), and more recently he was a member of the Polish Council of Monetary Policies (Rada Polityki Pieniężnej).

In 2019, after failing to be re-elected as a MEP, he was subsequently elected as a deputy of the Sejm for the Civic Platform (PO) in constituency No.

However, in July 2007 Dariusz Rosati has made a statement[5] in which he denied that cooperation went beyond sporadic contacts.

When Rosati was ten years old, his mother renounced his Italian citizenship on his behalf, and also Polonised and rearranged his name.