Theel has been exhibited and is represented in numerous collections—select shows include exhibitions at New Hope Arts, New Hope, PA; A New Leaf Gallery, Berkeley, CA; the Norman Rockwell Museum, Stockbridge, MA; the Shanghai Spring Art Salon, Shanghai, China; The Madison Mile at The Hollycroft Foundation, Madison, CT; Pier Walk, Chicago, IL; ART/OMI, Omi, NY; Pratt Institute Sculpture Park, Brooklyn, NY; and Contemporary Sculpture at Chesterwood, Stockbridge, MA. His sculptures are in collections in America and Europe including the Museum of Modern Art in Jacksonville, FL (JMOMA); The Metropolitan Museum of Art, New York, NY; Hall Financial Group, Dallas, TX; and Shanghai Krupp Stainless, Pudong, China, to name a few.