LONDON — Park Street Partners, the communications and business consultancy set up in 2018 by former MHP and Newgate chief executive Gavin Devine, has appointed Sally Costerton as a new partner.

Costerton was EMEA CEO and chairman of H+K Strategies for 12 years, from 1999 to 2011. She has been running her own communications advisory firm since leaving the agency, with a particular focus on technology clients: her non-exec roles include chairman of the board at media analytics firm Commetric.

Earlier in her career, Costerton was the managing director of Kaizo, and a director of the Quentin Bell organisation.

Park Street Partners now has 23 senior partners working alongside founder Devine, who said: “Today marks another big step forward for Park Street Partners with the addition of Sally to our existing line up of expert partners. Sally and I have known each other for years and everyone who knows her understands the depth of experience, good sense and expertise she brings to the team.”

Costerton added: “I am delighted to be joining Park Street Partners and looking forward to workings alongside Gavin again. I’ve been following the progress of the partnership since Gavin first shared the idea with me and I’m delighted its original concept is working so well.”

Park Street Partners recently announced a strategic partnership with public affairs firm PLMR.