Joan Ganz Cooney stepped down as chairman and CEO of the CTW before 1995 .
Joan Ganz Cooney stepped down as chairman and chief executive officer of the CTW in 1990 , when she was replaced by David Britt , who was her `` chief lieutenant in the executive ranks through the mid-1990s '' Davis , p. 260 and whom Cooney called her `` right-hand for many years '' .
Sesame Workshop