Øyvind Nordsletten started working for the Norwegian Ministry of Foreign Affairs in 1974. Øyvind Nordsletten has a long career as diplomat in Russia and Eastern Europe. He served at the Norwegian Embassy in Moscow from 1979 to 1982 as a diplomat of the Norwegian Ministry of Foreign Affairs. Nordsletten was Norwegian Ambassador in Ukraine from 1992 to 1996, deputy under-secretary of state in the Norwegian Office of the Prime Minister from 1998 to 1999, Norwegian Ambassador to Russia from 2000 to 2008 and to Ireland from 2008 to 2011. In 2011 he was assigned the position as the Norwegian Consul General in Murmansk, Russia. Since 2013 he holds a position in the MFA of Norway in Oslo.
In 2000 he was honored with a title of a Commander of the Royal Norwegian Order of St. Olav.
Ambasador Nordsletten was awarded honorary membership of the NRCC in December 2008. He was elected as a an NRCC Council Member in June 2014. As from 1 January 2019 he is replacing Reidar Karlsen as a new Chair of the NRCC Council.