Republic State Mortgage Company is a regional US residential mortgage banker.Our Purpose is Building Relationships At Republic State Mortgage, we believe in building relationships that deliver happiness and fulfill the American Dream. This purpose statement is how we approach each and every one of our customers. Our goal is to deliver you the best home lending options through an experience that leaves you comforted and confident about your decision. Your happiness is our priority. How It All Started Republic State Mortgage Co. (RSMC) is a full-service mortgage banker headquartered in Houston, Texas. Founded in 1994, RSMC is a privately held company owned and operated by Paulina McGrath and Robert Wagnon, a native Texan. With more than 20 offices spread across eight states, RSMC provides its customers with "best in class"​ loan products custom-tailored to fit nearly every financial scenario.