Susan Mills Birnbaum is the owner and operator of SusanSez NYC Walkabouts. Susan is a native New Yorker obsessed with its history and food, and since 2002 has been a licensed NYC Sightseeing Guide. She is also actively involved with the Guides Association of New York City (GANYC) as well as a member of many NYC historical societies, and volunteers as a docent at the Museum of the City of New York.