Roger Millar joined the Washington State Department of Transportation as Deputy Secretary in October 2015 and was appointed Secretary of Transportation in August 2016. He oversees an agency that is the steward of a complex, multimodal transportation system, and responsible for ensuring that people and goods move safely and efficiently.

Roger Millar is an engineer, planner and program manager with an international reputation for innovative approaches to conservation and development. The prominent theme that has run through his career has been planning and implementing transportation systems that are not ends unto themselves; but rather the means toward economic vitality, environmental stewardship, social equity, public health, and aesthetic quality. His work on the Portland Streetcar and the Glenwood Springs to Aspen BRT provided communities nationwide with new mobility tools. His Complete Streets leadership helped create a national movement for transportation systems that are safe, convenient, and pleasant for all users, regardless of how they choose to travel. His State DOT leadership is bringing innovation to agencies with enormous influence on transportation investment.

Millar is a Fellow of the American Society of Civil Engineers and a Fellow of the American Institute of Certified Planners. He serves on the American Association of State Highway and Transportation Officials Board of Directors (2022-2023 President), the ASCE Transportation and Development Institute Board of Governors (2022-2023 President), the USDOT Advisory Committee on Transportation Equity, the National Operations Center of Excellence Strategic Advisory Council and the National Complete Streets Coalition Steering Committee. Millar served on the ASCE Board of Direction from 2017 to 2020 and on the Board of ITS America from 2018 to 2023. He was ITS America Board Chair from 2021 to 2022.