Marvin started his banking career in 1998 and has been with Pinnacle Bank since 2004, becoming the Branch President of Eagle Ranch in 2018. He handles commercial and consumer lending with a focus on commercial real estate and construction loans. Marvin attended Oklahoma State University. He is currently a member and past President of the Rotary Club of Western Fort Worth. He serves on the boards of Leadership Northwest and Northwest YMCA as well as the non-profit McTeggart Irish Dancers of North Texas.