Mark Kelso has exhibited and sold his paintings through museums and galleries around the world. He has sold some through Christie's auction house in London and Bonham's in Singapore. In the year 2000 he was selected as featured artist for the international Beauty of Formosa exhibition with the National Museum of Natural History in Taipei, Taiwan. In 2002 Marks work appeared in a special exhibition at the National Geographic Society in Washington, D.C. He has been inducted into the Society of Animal Artists and the Artists for Conservation Group.