(born April 20, 1963) is an American structural engineer who invented the hybrid composite beam (HCB) and founded the HC Bridge Company.
At one point in his career, Hillman worked on developing fiber reinforced polymer (FRP) bridges.
This led to his idea of the hybrid composite beam: combining a concrete and steel tied arch structure within an FRP box.
A $320,000 grant from the Transportation Research Board's Innovations Deserving Exploratory Analysis (IDEA) program paid for the first HCB's to be constructed.
The steel strands act as a tie for the arch and carry the tensile load internal to the beam.