Media companies, media agencies
Mr. Greenberger has spent time on both sides of the desk in ad negotiations, working at media companies including Times Mirror Magazines, New York magazine and Wenner Media, as well as agencies including Grey Advertising and the agency formerly known as Campbell-Mithun-Esty.
“I’ve been toying around with my options,” he said. “Sometimes people do things kind of spontaneously.”
Zenith, part of Publicis Groupe, has not yet named a successor.