Hans Petter Graver received the degree of cand. jur in 1980, and was awarded a Doctorate of Laws (dr. juris) in 1986 - both degrees from the University of Oslo. In 1993 he was appointed Professor in Sociology of law with an obligation to teach administrative law. He was director of the centre of European Studies (ARENA) 2001-2003 and Dean of the Law faculty 2008-2015. In 2012 he was visiting fellow at Heidelberg University and in 2016 he was visiting fellow at the Institute of Advanced Study, Durham University. He has been member of the advisory council of the IAS.
Graver was president of the Norwegian Academy of Science and Letters 2019-2021. He was awarded an honorary doctorate at the University of Helsinki in 2010, at the University of Heidelberg in 2017 at the University of Uppsala in 2020 and at the University of Bergen 2022. He is an honorary member of the Law Society of Finland and member of the Academia Europaea (2022).
Graver is the author of more than 20 books. Among these are Judges Against Justice On Judges when the Rule of Law is Under Attack (Springer 2015), Der Krieg der Richter Die deutsche Besatzung 1940-1945 und der norwegische Rechtsstaat (Nomos 2019) and Valiant Judges, Iniquitous Law Thirteen Stories of Heroes of the Law (Routledge 2024).