The consulting arm of Aon Corp. will be working with the retirement services arm of Ameriprise Financial Services Inc. to sell a wide range of retirement plan actuarial, consulting and administrative services to employers.[@@]

Aon, Chicago, will supply services such as defined benefit plan design, actuarial valuation services, outsourcing services and development of human resources Web sites.

Ameriprise, Minneapolis, the company formerly known as American Express Retirement Services, will handle recordkeeping, compliance, investment management and custodial services for defined contribution plans. Ameriprise also will supply retirement education and planning services.