is a structural consultant specializing in the performance of underground structures, industrial structures, piping systems, and building components and materials, including composites, polymers, and structural plastics. He has conducted numerous studies using the finite element method to analyze the structural behavior of buried structures. Mr. Sharff has consulted to major manufacturers of underground storage tanks, thermoplastic storm chambers, and plastic and composite pipe. He has conducted numerous failure investigations of buried structures, piping systems, and structural plastics building components, often involving forensic field studies, laboratory testing programs, structural analysis, and expert testimony. He has provided design and construction administration of repairs and rehabilitations of distressed and damaged pipelines, foundations, and underground structures. Mr. Sharff has published articles and written reports on his work related to underground structures, pipe installation, and materials performance, including the effects of chemical exposure, creep, and fatigue on the performance of structural plastics and composites. Mr. Sharff has ten years previous experience as a contractor in heavy civil construction and pipeline construction.