CESA 8 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) Ameriprise Financial(800) 862-7919 Invesco OppenheimerFunds(800) 959-4246 Security Benefit Group(800) 888-2461 Thrivent Financial(800) 847-4836 WEA Member Benefits(800) 279-4030 457(b) Security Benefit Group(800) 888-2461 Roth 403(b) Invesco OppenheimerFunds(800) 959-4246 Security Benefit Group(800) 888-2461 WEA Member Benefits(800) 279-4030 Roth 457(b) Security Benefit Group(800) 888-2461