Christopher G. Seaman, P.E., CBSI, Senior Project Manager, has experience in the design of both pre-stressed concrete and steel bridges since 1999. His responsibilities have included the superstructure design, substructure design, and seismic design of both multiple and single span bridges throughout Pennsylvania. Mr. Seaman also has extensive experience in both the layout and design of both retaining walls and sound walls. Additional experience includes NBIS bridge inspections, sign inspections, sound wall & retaining wall inspections and shop drawing review. Currently, Mr. Seaman is a Project Manager in McMahon’s Bridge Unit and works from the Exton, Chester County Office.