Cline A. Siegenthaler is a part-time freelance illustrator and a full-time movie projectionist from Cleveland, Ohio. He enjoys projects that require a lot of non-human types (Dragons, gargoyles, dinosaurs, leather-clad lizards on motorcycles, etc...)

Cline has had work published in a handful of gaming manuals and had a comic book, Biff Thundersaur, published in 1991.