In 1983-84, Peter Nedergaard was a Robert Schuman research fellow in the research department of the European Parliament in Luxembourg and a stagiaire in the cabinet of agricultural commissioner, Poul Dalsager, in Brussels.
In addition, he has published a number of textbooks for high schools and universities on inter alia theory of science, European policy and the economics and politics of China, the USA, Germany and the EU.
He is also a prolific columnist and often appears in the media as a political expert and commentator.
In 2018, he was ranked as the second-most cited scientist at the University of Copenhagen by Uniavisen.
In addition, Peter Nedergaard is the initiator of the preparation of the "Oxford Handbook of Danish Politics", published at Oxford University Press in 2020, which is the most comprehensive international work on Danish politics so far.