Justin was born in the North East and studied Fine Art in the late 1980s, subsequently going onto work in commercial design. Later he turned to painting professionally and is perhaps best known for his representation of animals. He was a runner up in the 2018 wildlife artist of the year and received the Lyon and Turnbull Award for Painting at the 2018 Royal Scottish Academy Open. He was also selected for the 2018 New Light Prize Exhibition at the Bankside Gallery, London.