An associate professor of art at The Kansas City Art Institute, Cromwell has taught the history of photography, the history of film, contemporary art and aesthetics. He has been a visiting artist and lecturer at several colleges and been a juror of art competitions. He served as an editor of the literary magazine Words and photo editor of The Cottonwood Review, another literary magazine. In 1978 he served as program chair of the Society of Photographic Education?s national conference. Cromwell?s solo exhibitions include the Sheldon Memorial Gallery of Art at the University of Nebraska, the Douglas Drake Gallery in Kansas City and the University of Oregon Museum of Art in Eugene, Oregon. He has exhibited his photographic work in numerous invitational, group and juried exhibitions throughout the United States. His works appear in the collections of Mulvane Art Center, Mutual Benefit Life, University of Kansas Spooner-Thayner Museum of Art and the Denver Museum of Art.