“[The] directors and Mr. McGrath agreed that a change in leadership would best enable Unisys to move forward on accelerating execution of the company’s strategy,” the company said in a statement. No surprise there. The Unisys leadership–McGrath, in particular–has been under fire for a year now from MMI Investments LP, a New York investment outfit that holds about 9 percent of Unisys stock and isn’t at all happy with the way the company’s being managed. In an angry letter to the Unisys board of directors at the beginning of this year, MMI said it “felt tremendous frustration with the seemingly continuous stream of management, operational and financial missteps” at the company.