[4] In 2003 Aerts was one of the starters of the Omstreden Democratie (Controversial Democracy) project of the Netherlands Organisation for Scientific Research, which involved dozens of scientists doing research on Dutch democracy.
Aerts was also involved in the founding of the Research School of Political History, which functions as an educational institution for PhD-students.
[7] In 2017 Aerts transferred from the Radboud Univsersity to the University of Amsterdam where he became professor of Dutch History.
[3] Three years later he received the "Nederlandse biografieprijs" (Dutch Biography Price) for his book Thorbecke wil het about the 19th century Dutch liberal statesman Johan Rudolph Thorbecke.
[8] On 28 June 2022 Aerts held his farewell speech at the University of Amsterdam and his speech was titled Lalla Rookh, of de waan van de wetenschap (Lalla Rookh, or the delusion of science).