Rural Champaign County Special Education Cooperative Authorized Investment Providers For specific investment provider information, please click on the investment provider name of your choice to visit the company's website. 403(b) Security Benefit Group(217) 352-9000 457(b) Security Benefit Group(217) 352-9000 Roth 403(b) Security Benefit Group(217) 352-9000 Roth 457(b) Security Benefit Group(217) 352-9000