Sharrocks becomes chief executive of Aegis Media Northern Europe, which encompasses the UK and Ireland, the Netherlands and the Nordics.
Meanwhile, Marie-Laure Sauty de Chalon, who heads up Aegis Media France, is appointed chief executive of the company's southern Europe operation that includes France, Belgium, Italy, Greece, Israel, North Africa and the Middle East.
José Luis de Rojas, chief executive of Aegis Media Iberia is appointed boss of the agency in Iberia and Latin America, including Spain and Portugal.
Sharrocks, Sauty de Chalon and de Rojas have also been named as global executive board members, along with Andreas Bölte, chief executive of Aegis Media Central and Eastern Europe.
Malcolm Hunter, currently head of communications planning, has become the firm's first chief client strategy officer.
Jerry Buhlmann, who replaced Mainardo de Nardis as global chief executive of Aegis Media in May, said the promotions were "a natural move, and they reflect the balance of our business, with each cluster having critical mass and sharing some important cultural and market dynamics".
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