DST Systems, Inc. , a global provider of strategically unified data management, business processing, and customer communication solutions, today announced it has completed the previously announced acquisition of retirement plan rollover specialist Wealth Management Systems Inc. . New York-based WMSI, a leading provider of retirement plan rollover technology, content and communications, and practice management solutions to the financial services industry, is connected to recordkeepers servicing over 33 million participants and provides automatic rollover services to over 25,000 plan sponsors.