David James Shearer (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 spent nearly 20 years working for the UN, managing the provision of aid to countries including Somalia, Rwanda, Liberia, Kosovo, Afghanistan, Lebanon and Iraq. In 1992, Shearer was (together with his wife) named as New Zealander of the Year by The New Zealand Herald. On 13 June 2009 he won the Mount Albert by-election and entered the House of Representatives. He was elected as leader of the Labour Party on 13 December 2011 but resigned on 15 September 2013, being succeeded by David Cunliffe. 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.