Dennis has been active for the past 20 years and has been painting for Mbantua since late 1980's. His watercolour paintings are delicate yet evoke the sense of light typical of the Central Australian landscape.

The landscape represented tends towards east of Alice Springs, often located near Ross River. His art is a form of relaxation from his job as a stockman, in the early years, and more currently as a Stock Manager on an Aboriginal owned Cattle Station east of Alice Springs. Dennis has a natural ability in regards to the arts. He is renowned for landscape paintings but has also painted delicate landscapes onto river rocks. Dennis will experiment with different mediums carving using materials he finds out bush; an example was Kangaroo's cut out of poly pipe.