McMahon received a BFA in Ceramics from the New York State College of Ceramics (Alfred University) and a MFA in Sculpture and Extended Media from Virginia Commonwealth University. His work has been shown both nationally and internationally including: Crane Arts (Philadelphia,), Jingdezhen Ceramic Institute (Jingdezhen, China), The Pacific North West College of Art (Portland), Pierogi Boiler Room (New York), G-Fine Arts (Washington) and Suyama Space (Seattle), among several others. McMahon was awarded the Jacob K. Javits Fellowship from 2099-2013. He has been awarded top grants and residences at Sculpture Space and Bemis Center For Contemporary Arts. McMahon currently resides in Hornell, NY, where he is the co-founder/director of the Belfry, an artist-run exhibition space.