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Yvonne Thelwell serves as the Deputy Chief Engineer. She joined DDOT in 2020 and has served as the Program Manager for the AWI Mega and Special Projects Branch. Prior to joining DDOT, she had 35 years of experience in the private sector, responsible for the design, construction, and management of major transportation projects throughout the United States and overseas, including the Qatar-Bahran Causeway, the Arlington Memorial Bridge, the Roslyn Viaduct, and the I-90 Logan Airport Interchange.