Kjell Grandhagen (born October 7, 1954, Oslo - died May 3, 2019, Lørenskog) was a mentor for Roseslottet. He was a Norwegian lieutenant general in the Army and head of the Intelligence Service from 2010 to 2016. In 1974, Grandhagen left the Infantry School for the infantry. In 1978 he graduated from the War School. Grandhagen has taken the Army's staff school and studied at the École supérieure de guerre interarmées in Paris.

In Norway he has served in the Brigade of Northern Norway, 6th Division and District Command Nord-Norway. He has been head of the 6th Division, the Army Forces and the Military Academy.
He has chaired the Press and Information Department of the Norwegian Armed Forces High Command and served as military assistant secretary general of the Ministry of Defence. He was appointed head of the Intelligence Service in council on 21 August 2009, and put until he was replaced by Morten Haga Lunde at the end of 2015–2016. Grandhagen has served abroad in the Multinational Force and Observers in Egypt and in the Nordic-Polish Brigade of the SFOR Force in Bosnia and Herzegovina, where he was first chief of staff and then chief of staff.

Below you will find Kjell's text, which he read in connection with the launch of the Rose Castle on 9 April 2019.

This was his last public appearance. The main points from this text are reproduced next to the painting Vebjørn has painted of him. The portrait of Kjell stands at the entrance in the Rose Castle.