Ameritrade announced new executive appointments that will take effect when it completes its acquisition of TD Waterhouse-a deal expected to close by the end of the year.
   Chris Armstrong, currently acting president and chief executive officer at TD Waterhouse, will assume the role of executive vice president of sales and marketing for the merged company, which will be called TD Ameritrade.
   Randy MacDonald, Ameritrade's chief financial officer and chief administrative officer, and Asiff Hirji, Ameritrade's chief operating officer, will remain in their roles after the merger, according to a statement released today by Ameritrade. They will continue to serve as advisors to CEO Joe Moglia.
   Laurine Garrity, currently vice president of marketing program development at Ameritrade, will become chief marketing officer and report directly to Armstrong. Anne Nelson, Ameritrade's current chief marketing officer, will continue to serve the company in an "advisory and consulting capacity," according to Ameritrade.
   Larry Szczech will be appointed president of TD Ameritrade's client group, where he will oversee client segmentation initiatives and the delivery of client-driven products. He will report directly to Moglia.