The agency will handle all online and offline customer and business-to-business marketing communications.
Creative Direction won the account following a competitive pitch led by Fujitsu Siemens' head of marketing operations, David White.
The agency will create a series of marketing projects that will take in direct mail, online, in-store collateral and press advertising.
Earlier this month, Fujitsu Siemens announced it was pulling out of the PDA and GPS gadget markets, where it operated under its Pocket Loox brand, to focus on its other mobile products, including notebooks and tablets. The company believes the PDA market will decline it claims smartphones will soon offer similar options.