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Mr. Zachreson is a licensed professional engineer with over 20 years of experience in architectural and structural engineering and construction.  He has conducted over 2,000 forensic engineering investigations, most of which have involved structural and building envelope (roof coverings, wall cladding, windows/fenestrations) damage and/or failures.  His engineering experience includes root cause studies of structural failures and collapses, moisture intrusion and condensation, soil subsidence, foundation settlement and heaving, damage assessment related to earthquake, fire, and storm events (hail, wind, hurricane, snow and ice), wind vs wave damage assessment, water testing and destructive testing of various building assemblies, stucco testing, design of temporary and permanent repairs for damaged structures and building envelope systems, structural framing and foundation design and analysis.  Other experience includes expert witness testimony in depositions, construction of light framed buildings, and engineering management.  Mr. Zachreson has developed and presented instructional courses on earthquake damage evaluation, snow/ice structural damage evaluation and wildfire building envelope damage assessment.  As District Engineering Principal, he oversees the engineering division for Northern California and Northern Nevada.