[1] He studied law in the 1960s in Freiburg im Breisgau, Göttingen, and Aix-en-Provence and then worked as an attorney in Hannover.

In 1972, he joined the diplomatic service of the Federal Republic of Germany, which he served in the United Nations in New York.

After the meeting of the political directors of the US, British, French and German foreign ministries in Bonn on 6 March 1991, Chrobog wrote: “We made it clear in the two-plus-four negotiations that we would not take NATO beyond the Elbe stretch.

"[4][5] In 2003, as undersecretary of state, Chrobog was responsible for dealing with the crisis provoked by the kidnapping of German tourists in Algeria.

[2][6] Chrobog retired in 2005 and became chairman of the supervisory board at the BMW Foundation Herbert Quandt [de].