Kathamann has been active in New Mexico's art community for over thirty years exhibiting in juried, group and one-person shows. She received her B.A. in Visual Arts, cum laude, from the College of Santa Fe. She has also studied with Helen Frankenthaler, John Chamberlain, and Beverly Pepper at the Santa Fe Art Institute. Jorge Fick, noted modernist painter, was her painting mentor.
Mishell Karma Gaia, a l973 Karmann Ghia, was transformed into an art car and was inducted into the Houston Art Car Museum in 2007 after winning first place in 2002 and 2007 at the Orange Show's Art Car Parade, Houston. Photos of Mishell have appeared in numerous publications including Raw Vision, the world's leading journal of outsider art, and The People's Paper of Beijing.
The Hollywood film "MacGruber" included a large red sculpture by Kathamann.