This geotechnical and underground construction expert witness holds a Ph.D. in Civil Engineering and brings more than 45 years of experience in geology, engineering geology, heavy and underground construction, tunneling, microtunneling, mechanical excavation, and dredging. His prior employment history includes roles as a construction field investigator, project consultant, technical advisor to contractors and public agencies, board consultant on major tunnel projects, visiting professor and continuing education instructor, and consultant on feasibility, design interpretation, and underground construction performance. He has provided geotechnical expert witness services for more than 40 years and has been qualified in court as an expert in geology, geotechnical engineering, underground construction, construction safety, blasting, and construction performance analysis. His dispute-related work includes analysis and adjudication of differing site condition claims, forensic investigation of machine and operational failures, and evaluation of geotechnical and construction performance issues.

His technical expertise includes feasibility studies, site exploration, geotechnical interpretation, pre-construction and pre-bid assessments, and analytical methods for predicting tunnel boring machine (TBM) penetration rates, cutter life, and excavation performance. He has conducted independent investigations involving machine failures, operational deficiencies, water inflow, ground support requirements, and construction delays associated with subsurface conditions. He has served as a panelist with the American Arbitration Association and has held Registered Professional Geologist licenses in California, Georgia, and Idaho. Professional affiliations and memberships have included the American Society of Civil Engineers, the Geological Society of America, the International Tunneling Association, the Disputes Review Board Foundation, the Association of Engineering Geologists, the International Association of Engineering Geologists, the British Tunnelling Society, the Tunnel Association of Canada, and the Society of Mining Engineers.