MediaVest USA, founded in 1959, is a leading, full-service media specialist agency, offering clients a wide spectrum of communication expertise relating to advertising media selection services (See capabilities section). MediaVest USA is based in New York City, with additional offices in Chicago, Los Angeles and San Francisco. The agency currently has over 750 employees. MediaVest, a division of Starcom MediaVest Group (SMG), part of the VivaKi operating system, is a subsidiary of Publicis Groupe, a Paris-based holding company which is the worlds third largest communications group, the worlds second largest media counsel and media buying group, and a global leader in digital and healthcare communications. MediaVests sister agencies include Starcom and Spark.