Samantha J. Biddle

Samantha J. Biddle started serving as Acting Transportation Secretary in August 2025. Previously she served as Deputy Transportation Secretary since 2023. Acting Secretary Biddle has spent nearly two decades in the transportation industry, serving in both the public and private sector.

As Deputy Secretary, she served as a member of the Secretary’s cabinet and as the primary liaison to the Governor’s office, leading on policy and operational matters to ensure the successful management of the Maryland Department of Transportation’s (MDOT) Secretary’s Office and six transportation modes spanning transit, highways, airport, port, tolling and motor vehicle services. In this role, she coordinated with internal and external stakeholders on project and policy matters including development and review of state and federal legislation, economic development opportunities, and innovative funding pursuits; oversaw development of capital and operating budgets and corresponding stakeholder messaging; monitored and supported the major infrastructure profile of MDOT; and created a people-based, department-wide narrative strategy focused on safety, positive return on investments, delivery and innovation

Acting Secretary Biddle joined state service in 2014, beginning as the State Highway Administration’s (SHA) Regional Planner for Frederick and Montgomery Counties. She was then promoted to Assistant Chief and Chief of Regional and Intermodal Planning, and Director of Organizational Excellence and Strategy. Following her time at SHA, she was selected to serve as Chief Strategy Officer within the Secretary’s Office and then advanced further to serve as Chief of Staff.

Acting Secretary Biddle holds a bachelor’s degree in geography from the University of Delaware and is an American Institute Certified Planner (AICP). She also completed the American Association of State Highway and Transportation Officials (AASHTO) Executive Institute and SHA Advanced Leadership Program. She serves as Maryland’s voting member for AASHTO’s Transportation Policy Forum, Chair of the AASHTO Census Transportation Solutions (ACTS) technical service program, is a Director-At-Large for Women’s Transportation Seminar (WTS) – Baltimore Chapter and serves as a Young Professionals Program Mentor. She was named one of the Daily Record’s Maryland Top 100 Women for 2024 and named WTS Baltimore’s Woman of the Year in 2024. Prior to joining SHA, Acting Secretary Biddle worked in the private sector as an Associate Transportation Planner with JMT Engineering for eight years.

Acting Secretary Biddle lives in Carroll County with her two daughters, husband, and dog. She is a lifelong field hockey player, participating regularly in both local leagues and the U.S. Women’s Masters Team.