Dr. Sanjaasuren OYUN is the Director of External Affairs at Green Climate Fund. She was elected and served as the first President of the United Nations Environment Assembly during 2014-2016. She also served as the Chair of the Global Water Partnership, a major multi-stakeholder platform advancing water security around the world.

Prior to these roles, Dr. Oyun was one of the leading politicians in Mongolia and worked as Minister of Foreign Affairs and Minister of Environment and Green Development. She served five terms as Mongolia's Member of Parliament between 1998-2016. While in Parliament, Oyun successfully championed a number of reforms, especially in good governance, green development and rights of children with disabilities. Oyun graduated from Karlova University in Prague and holds a PhD. in Earth Sciences from Cambridge University, UK.