Clement-Jones is a consultant of the multinational law firm DLA Piper, and formerly held positions as London managing partner (2011–2016), head of UK government affairs, chairman of its China and Middle East Desks, international business relations partner, and co-chairman of global government relations.

Clement-Jones was a non-executive chairman of the environmental strategy and communications consultancy Context Group from 1997 to 2005.

Clement-Jones was made a life peer taking the title Baron Clement-Jones, of Clapham in the London Borough of Lambeth on 17 July 1998[1] and until July 2004 was the Liberal Democrat health spokesman, and thereafter until 2010 Liberal Democrat spokesman on culture, media and sport, in the House of Lords.

He is deputy chairman of the All-Party Parliamentary Group on China and vice chairman of the All-Party Parliamentary Groups for Iraqi-Kurdistan, Ovarian Cancer, Publishing, Writers and Intellectual Property.

Clement Jones has also served in the following positions: He is the son of Maurice Llewelyn Clement-Jones and (Margaret) Jean, née Hudson.