 In 1983, Nisenholtz joined Ogilvy & Mather Worldwide where he founded the Interactive Marketing Group (IMG), the first full-service interactive unit at a major US advertising agency.He guided the firm's interactive strategy and operations for 11 years until his departure in 1994, at which time he was a senior vice president and a member of the operating committee.He then worked for one year as director of content strategy for Ameritech Corporation, one of the so-called Baby Bells, where he was responsible for guiding development of new video programming, interactive information and advertising services.