The head of Morgan Stanley 's long-troubled retail brokerage unit has told John J. Mack that he will step down after a successor is found , according to an internal memorandum sent to employees yesterday .
John J. Mack /business/person/company Morgan Stanley
DT NN IN NNP NNP POS JJ JJ NN NN VBZ VBN NNP NNP NNP IN PRP MD VB RB IN DT NN VBZ VBN , VBG TO DT JJ NN VBN TO NNS NN .
John J. Mack
PERSON
Morgan Stanley
ORGANIZATION
/business/person/company