The Lithuanian office was opened last year in collaboration with its sister media network Starcom. The ZenithOptimedia operation has a client list including Nestle, Electrolux and British Airways.
Andras Vigh, the chief executive of ZenithOptimedia for Central and Eastern Europe and the Middle East, said in a statement: "The appointment is a major step for us in the Baltic region. It signals our strong intention to strengthen and build our presence. The experience he brings will strongly improve our offering."