Jonathan Powell (Labour adviser)Jonathan Nicholas Powell (born 14 August 1956) is a British diplomat who served as the first Downing Street Chief of Staff, under British prime minister Tony Blair from 1997 to 2007. He was the only senior adviser to last the whole period of Blair's leadership. During this period Powell was also the chief British negotiator on Northern Ireland.
In 2007, Powell joined Morgan Stanley as a full-time senior managing director of its investment banking division.
He runs the charity Inter Mediate which works on armed conflicts around the world. In 2014, David Cameron appointed Powell to be the UK's special envoy to Libya. Provided by Wikipedia