- Chairman of the Left-Green Movement since 2013.
- Date of Birth: February 1st, 1976
- Party: Left-Green Movement
- Member of Althingi for the Reykjavík North Constituency since 2007.
- Deputy Chairman of the Left-Green Movement's parliamentary group 2007-2009.
- Member of the Economic Affairs and Trade Committee 2015-2016.
- Member of the Icelandic Delegation to the EFTA and EEA Parliamentary Committees 2014-2016.
- Member of the EU-Iceland joint Parliamentary Committee 2014-2016 (Deputy Chairman 2014-2016).
- Member of the Foreign Affairs Committee 2014-2015.
- Member of the Environment and Communications Committee 2013-2014.
- Member of the Education Committee 2007-2009.
- Member of the Economy and Taxation Committee 2007-2009.
- Member of the Icelandic delegation to the West Nordic Council 2013-2014.
- Minister of Education, Science and Culture 2009-2013.
- Minister for Nordic Cooperation 2009-2013.