The Nebraska Public Employees Retirement System has agreed to use Buck Consultants to help run its defined benefit retirement plans for at least 3 more years.

Buck, New York, a unit of Affiliated Computer Services Inc., Dallas, has been providing retirement plan services for Nebraska PERS plans since 1998.

The Nebraska PERS plan serves about 93,000 Nebraska public employees and retirees, Buck says.

The dollar value of the contract was not immediately available.