Hirst will handle accounts including Unilever’s Marmite and Flora when he starts on 17 March.
Since joining Dare in 2011 as an associate planning director, Hirst has overseen the EE, Post Office and Vodafone accounts. Before Dare, he worked at Grey on the British Heart Foundation.
Dom Boyd, the head of planning at A&E/DDB, said: "Nick’s record as a modern, innovative thought-leader speaks for itself. Plus, he’s a lovely bloke. We’re thrilled he has chosen to join us."
A&E/DDB made a string of planning hires last year including Toby Harrison from Droga5 in Sydney, Jessica Lovell from Mother London and Georgia Norton from R/GA New York.