Mitchell J. Lieberman Mitch is global co-head of Global Securities Services (GSS) in the Equities Division of Goldman Sachs. Mitch serves as a member of the Equities Division Operating Committee, and as Director of the Goldman Sachs Trust Company and Goldman Sachs Cayman Trust. Mitch became a Managing Director in 1997. Mitch joined Goldman Sachs in 1980 in Global Operations. goldmansachs