A former Ameritrade executive has been named chief operating officer of The MuniCenter L.L.C., a fixed-income trading system founded six years ago.
   James Wangsness, former senior vice president and managing director of Ameritrade Advisor Services, will be responsible for the firm's retail sales, marketing and product development efforts, according to The MuniCenter.
   Before Ameritrade's merger with TD Waterhouse last year-creating TD Ameritrade-Wangsness headed Ameritrade's independent advisor business, which served 1,600 RIAs and had more than $7 billion under custody.
   The MuniCenter was among the third-party services used by Ameritrade Advisor Services.
   "Almost overnight, Ameritrade had a strong agency offering adhering to the best principles of best execution all due to TMC's superior client focus," Wangsness said.