Don Dusenberry joined the Engineering Mechanics Division of Simpson Gumpertz & Heger Inc. in 1975 and serves as a Senior Principal. He has taken part in numerous complex investigations, analyses, and peer reviews of buildings, building components, and infrastructures. He has extensive experience in investigations of failed structures, including buildings, bridges, and mechanical structures. Don is an active participant in numerous professional organizations, including the Structural Engineering Institute of the American Society of Civil Engineers, for which he is a former President of its Board of Governors. Don has written extensively on failure investigations and topics such as structural performance under extreme events including blast, fire, and disproportionate collapse.