Carol Sung was named manager of 401(k) product management at International Paper Co., Stamford, Conn., said Robert Hunkeler, vice president and director of investments. She will oversee the company's $4 billion in defined contribution assets. Ms. Sung, who was previously a consultant with Segal Co., New York, replaces George Sloan, who left at the end of February. Ms. Sung 's responsibilities at Segal were assumed by others.