A lifer within the Pritzker organization, Mr. Hoplamazian reorganized the family business during an acrimonious feud, then took over the hotel chain. Mark Hoplamazian, the chief executive of Hyatt Hotels, has worked for one family for the bulk of his professional career. He attended Harvard College and got his M.B.A. at the University of Chicago. After short stints at First Boston and the Boston Consulting Group, he joined the Pritzker family’s sprawling business empire in 1989.