Jennifer Toth was appointed director of the Arizona Department of Transportation on January 5, 2023, to lead the agency responsible for planning, designing, building, maintaining and operating the state’s multimodal transportation system, managing transportation revenue, and providing motor vehicle title, registration and driver license services.
Jennifer has over 25 years of experience in the public works field. She has spent the majority of her career working in the public sector and was most recently the Director for the Maricopa County Department of Transportation (MCDOT) as well as the Maricopa County Engineer. Before joining MCDOT in 2014, Jennifer served as State Engineer and Deputy Director of the Arizona Department of Transportation. She has also worked in the private sector as a transportation consultant.
Jennifer holds a Bachelor of Science degree in Civil Engineering from the University of Houston and a Master of Science degree in Civil Engineering from the University of New Mexico. She brings a passion for public service and meeting the transportation needs of the residents of the State of Arizona.
Greg Byres serves as the State Engineer/Deputy Director for transportation. Supervising the Infrastructure Delivery and Operations Division (IDO), Transportation Systems Management and Operations Division (TSMO), and the Multimodal Transportation Division (MPD), he leads development and delivery of the ADOT construction program, including environmental studies, engineering design, land acquisition and construction. He also supports the maintenance and operation of more than 6,000 miles of interstate and state highways in Arizona.
Greg joined ADOT in 2015, having served as a senior project manager, State Roadway Engineer and as Director of the Multimodal Planning Division.
Eric has served as City Engineer for the City of Phoenix since January 2019 and during that time has completed a 6 month assignment as Interim Water Services Director, 4 month as Interim Public Works Director, and 1 month as Interim Street Transportation Director. Eric possesses nearly a quarter century of relevant public works, residential, and commercial land development engineering experience. Prior to joining the City of Phoenix, Eric was the New Mexico Operations Manager for TYLIN International and prior to that was a Senior Project Manager for RBF Consulting in Arizona. After spending two decades working as a private consultant, Eric desired to utilize his engineering and management expertise in a way that more directly benefited the public. As the City Engineer for the nation’s 5th largest City, Eric is responsible for overseeing the selection of architects, engineers & contractors and the execution the City’s 5-year, $11.0 billion Capital Improvement Program.
Eric holds a bachelor’s degree in Civil Engineering from the University of Arizona and is a Registered Professional Engineer in Arizona, California, and New Mexico. Eric is currently a member of the Alumni Industry Council for the University of Arizona and previously held the position of State Director for ACEC-NM.