High Representative Christian Schwarz-Schilling appointed Gregorian the new supervisor for Brcko District and Deputy High Representative at the OHR Regional Office in Brcko, the statement said.
The outgoing supervisor, Susan Johnson, was appointed to this post in January 2004.
Gregorian has already served in Bosnia-Herzegovina and the Balkans. He currently holds a senior civilian post in the NATO headquarters in Sarajevo in charge of defence reform and is a political advisor to the commander.
In 2005 he was a NATO co-chairman of the Commission for Defence Reform in Bosnia-Herzegovina to which post he was appointed by former High Representative Paddy Ashdown.