Heiner is a multi-media artist and sculptor. His talents encompass watercolor paintings, plein-air paintings, and loose impressionistic oils, small and life-sized sculptures. Heiner, a member of the Society of Animal Artists, exhibits work in the Society's shows, the Susan K Black Foundations artist workshop and others locally and across the country. Some of his awards include first place in state duck and trout stamp competitions, several Ducks Unlimited Artist of the Year and & Birds in Art”. Heiner's art is displayed in museums and private collections internationally.

Heiner received the formal art training in Hamburg, Germany. He immigrated to the United States in 1965 where he owned a commercial art studio until his recent retirement, which now gives him more time to paint and sculpt. He has established an open art studio and school, where he teaches and shares his passion to create art with others.