Leendert Adrie "Ad" Geelhoed (12 November 1942 – 20 April 2007) was a Dutch professor, civil service worker, and Advocate-General of the European Court of Justice.
Geelhoed was born in 1942 in Vught, he finished his study of Dutch law at Utrecht University in 1970.
Geelhoed then moved to Luxembourg to work as an assistant for the Dutch judge André Donner at the European Court of Justice.
In 1983 he took his role as advisor to a higher level when he became member of the Scientific Council for Government Policy.
[1] During his time as Secretary-General in the early 1990s he stated that the Netherlands could fire up to a quarter of its civil servants.