Cartwright is to be a director in H&K’s public affairs practice, where he will report to MD Tim Fallon and become a member of the company’s board.
Cartwright said he expected to serve out his three-month notice at GCI, where he is a director and head of public affairs.
He became GCI’s first PA consultant when he joined the agency in October 1999 from Politics International, and worked at Labour Party headquarters during the 1997 general election.
‘I’m looking forward to being part of an agency of H&K’s stature and serving on the board,’ he said.
His departure will come as a blow to GCI’s public affairs practice, whose new business wins this year include Dairy Crest and government body the National Endowment for Science, Technology and the Arts.
Cartwright is one year into his three-year term chairing the PRCA’s public affairs committee.
Hill & Knowlton has picked up the University of Hertfordshire’s £100,000 PA account after a five-way pitch.
The agency’s brief is to boost ties with the local community in Hatfield and improve coverage and standing in the local media.
H&K head of corporate affairs Andrew Pharoah is leading the account.