The Ohio Public Employees Retirement System has agreed to stick with a retirement services provider.

OPERS has extended a contract with ING Institutional Plan Services, Quincy, Mass., a unit of ING Groep N.V., Amsterdam, ING says.

The contract covers administration of OPERS’ defined contribution plan and a hybrid defined benefit-defined contribution plan, ING says.

The plans manage about $200 million in assets for 16,500 participants.

ING first won the contract 6 years ago.

ING provides all recordkeeping for the defined contribution plans, and it also handles participant education and communications efforts.