Registered and certified professional geologist. Forty-five years of effective raw materials exploration, troubleshooting, petrography, innovative research, and expert witness services for the aggregates, industrial sand, asphaltic concrete, historic materials, and Portland cement concrete industries. Proven ability to communicate with all levels of geologists, engineers, attorneys, contractors, owners, agencies, and the general public. Extensively published technical author. Enthusiastic, goal-oriented lecturer and trainer. Specialties: Exploration for aggregates. Exploration for industrial sand. Forensic investigations of building materials. Petrography (Microscopy) of concrete, mortar, brick, tile, terra cotta, building stone, historic materials, etc. Alkali Silica Reactivity (ASR). Alkali Carbonate Reactivity (ACR). Delayed Ettringite Formation (DEF). Pyrrhotite deterioration.