MSQ Partners’ award-winning integrated agency Stack has announced the appointment of Ben Stephens as executive chairman. In his new role Stephens will be responsible for the agency’s strategy and operations and with a particular remit of looking to identify and exploit opportunities to bring the agency’s modern data, CRM and digital capabilities to bear for clients across the group. Stack, formerly CMW, has been one of the leading direct agencies in the UK and works with clients that include Beiersdorf, Canon, Citroen and Peugeot.