Westwood One digital head Richard Kosinski is leaving the company to join the social graph ad targeter Media6degrees as its chief revenue officer. Before his two-year stint at the radio network, he was at Yahoo (NSDQ: YHOO) for nine years and helped to start Yahoo’s political advertising business. Before that, he held executive sales posts at Forbes, CNet and the WSJ.
Kosinski’s hiring comes nearly a year after for Google

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