Born in Cincinnati, Ohio in 1953, Hehemann received a BFA in sculpture from the Herron School of Art, Indiana University-Purdue University at Indianapolis in 1975. After receiving an MFA from the University of Illinois at Urbana-Champaign in 1977, Hehemann co-founded Vector Custom Fabricating in 1978. Vector is an architectural metals and sculpture fabricating company that continues to server the art and construction communities. Through the use of the facilities, contacts and expertise provided through work in the industry Hehemann continues to pursue his interest in sculpture on a small and large scale, exploring a variety of concepts and materials, including steel, stainless steel, stone, and concrete. These works have been exhibited throughout the country.