George is also a Native American artist and has been sculpting and teaching art for over 20 years. His work centers primarily on monumental stone and bronze sculpture, painting and architectural design. The driving force behind all of his creations is the Native American Pueblo culture. George’s artwork reflects the symbolism and realism of both the past and present-day life of the pueblo people. Many of his subjects focus on pueblo dancers. One of his recent pieces, on permanent display in the Pueblo of Pojoaque, is a12-ton monumental sculpture of a buffalo, carved from Virginia soapstone. For Rivera, the buffalo is a symbol of stability for his tribe, both culturally and economically. His newest monumental creations, on display at the Buffalo Thunder Resort and Casino, include a bronze Buffalo Dancer, Deer Dancer and Butterfly Dancer. He is responsible for the architectural style and aesthetics of this outstanding resort.​​