Sources familiar with the matter confirm that after spending the last 18 months as North American CEO of O&M’s Neo@Ogilvy division, Nancy Mullahy is leaving the agency. From what we’ve been told, Mullahy is leaving on her own and wants to “have more personal time.” Prior to joining Neo@Ogilvy, the exec spent 15 years in various roles at Starcom MediaVest Group including EVP/managing director and president of SMG Performance Marketing. We’ve obtained a memo sent to staff yesterday from Neo@Ogilvy worldwide CEO Nasreen Madhany that addresses Mullahy’s departure and her successor, eight-year Neo vet Sean Muzzy. You can read it verbatim after the jump.

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