Until now, marketing for Samsung's mobile business has been overseen by Mark Mitchison, general manager of its wireless division, and Eammon Collins, head of marketing communications for the brand.
The successful candidate, who will report to Mitchison, will develop handset campaigns and online activity for the Fun Club loyalty scheme.
They will also work closely with retail partners and mobile operators, who market the handsets to customers as part of tariff offers.
Samsung has a 13% share of the global mobile phone handset market, according to Strategy Analytics, and has been gaining customers from Nokia, whose market share has now dropped below 40%.
Samsung Mobile's advertising is handled by Korean agency Cheil. It is reviewing its global account, which WPP is tipped to win. Cheil's local work will be unaffected.