
Johnstone joins the agency from Abbott Mead Vickers BBDO where he worked on brands including Guinness, Motorola and Footlocker. He started his career at AMV before moving to DLKW, now DLKW Lowe, and then The Brooklyn Brothers.
He returned to AMV in 2012 as a global planning director to work on its BlackBerry account.
Johnstone said: "I’ve always admired 72andSunny for its focus on creativity and cultural relevance, so the chance to be part of such an inspiring place at such an interesting time, makes me excited about what is possible."