Dr. Roberto T. Leon is the C.E. Via Professor of Civil and Environmental Engineering in the Via Department of Civil Engineering at Virginia Tech. Over a 40 year career in experimental structural engineering, his research interests have centered on dynamic behavior and design of composite and hybrid steel-concrete structures, composite action in beam-slab systems, bond of reinforcement under cyclic loads, testing of full-scale and model structures in the laboratory, and field instrumentation of structures. Dr. Leon is very active in national and international technical and professional committees. He has served in the Provisions Update Committee (PUC) of the Building Seismic Safety Council (BSSC), the Committee on Specification of the American Institute of Steel Construction (AISC), the Advisory Committee on Structural Safety of Veteran Administration Facilities, and numerous other technical committees of the American Concrete Institute (ACI), the American Iron and Steel Institute (AISI), the American Institute of Steel Construction (AISC), the Structural Engineering Institute (SEI/ASCE) and the International Association for Bridge and Structural Engineering (AIBSE).