Pioneer Group promoted three members of its investment management staff and gave them expanded roles within Pioneer Investment Management, its investment management subsidiary. Steven M. Graziano is responsible for global marketing for Pioneers retirement plan programs. He was director of domestic marketing. Theresa A. Hamacher is now responsible for global investment operations and will direct separate account sales. She remains chief investment officer. Stephen W. Long is now responsible for U.S. retail distribution and will help form a retail distribution organization for Pioneer in Europe. He was national sales director. Along with David D. Tripple, president of Pioneer Investment Management, the three will form the subsidiarys executive committee.