Russell P. Fradin was named chairman and CEO of Hewitt Associates, starting Sept. 5, said Kelly Zitlow, spokeswoman. He will replace Dale Gifford, who plans to retire Sept. 30. Mr. Fradin was president and CEO of the BISYS Group. Robert J. Casale, BISYS chairman of the board, will serve as interim president and CEO while company officials search for a permanent successor, according to a news release from BISYS. The BISYS board has formed a search committee.