In 1992 he was professor of Art History at the Department of Theater Studies of the School of Philosophy of the University of Athens.
On 31 October 2014, at an event held in the main building of the Museum, he announced his departure from the post of director, now occupying a seat in the Administrative Committee of the Foundation.
In June 2016 he was elected as full member of the Academy of Athens, in the archeology-museology department.
[4][5] Delivorrias managed to attract the interest of many donors and he realized a narrative process of development, consisting in the prominence of Greek civilization from antiquity to contemporary art.
According to himself, he was the longest-lasting internationally head of the Museum, but at the same time the manager, the fundraiser and the scientific officer, as well as the man who had undertaken all sorts of contacts with the administrative services of the Greek state.