Morgan Stanley said its global head of operations, technology and data, Stephen Daffron, plans to retire from the securities company, which split up his responsibilities among three executives.

In a memorandum sent to employees, reviewed by Dow Jones Newswires, Morgan Stanley chief operating officer James Rosenthal said Daffron informed him of his decision to retire, though he will remain a senior adviser to the company and will "continue to represent Morgan Stanley on The Depository Trust & Clearing Corporation."