David James Shearer MBE (born 28 July 1957) is a New Zealand United Nations worker and politician. He was a member of the New Zealand Parliament for the Labour Party from 2009 to 2016, serving as Leader of the Opposition from 2011 to 2013. Shearer resigned from Parliament in December 2016 and in 2017 was appointed to head the United Nations peace keeping mission in South Sudan. in January 2021, he was succeeded in the role by Nicholas Haysom.