The type of education required depends on the banker position within in the bank. Bank teller only need a high school diploma or GED + A bank teller certification + background check). While, personal/retail bankers require a BA degree + certification to sell/buy bonds, stocks, etc.). Commercial bankers, investment bankers and merchant bankers require a BA degree and certifications). Investment and merchant bankers typically have a bachelor-level degree and have previously worked in financial analyst roles.