The Maryland Department of Transportation (MDOT) is an organization comprising five business units and one Authority:
Maryland Transportation Authority (Transportation Secretary serves as chairman of the Maryland Transportation Authority) Maryland Transportation Authority Police Maryland Transit Administration Maryland Transit Administration Police Maryland Port Administration State Highway Administration Maryland Motor Vehicle Administration Maryland Aviation Administration
Secretaries of Transportation 2025–present, Kathryn B. "Katie" Thomson 2025, Samantha Biddle (Acting Secretary) 2023–2025, Paul Wiedefeld 2022–2023, James F. Ports Jr. 2020–2022, Gregory I. Slater 2015–2020, Pete K. Rahn 2013–2015, James T. Smith Jr. 2012–2013, Darrell Mobley (Acting Secretary) 2009–2012, Beverley K. Swaim-Staley 2007–2009, John D. Porcari 2003–2007, Robert L. Flanagan 1999–2003, John D. Porcari 1995–1998, David L. Winstead 1991–1994, O. James Lighthizer 1987–1991, Richard H. Trainor 1984–1987, William K. Hellmann 1981–1984, Lowell K. Bridwell 1979–1981, James J. O'Donnell 1977–1979, Herman K. Intemann 1971–1977, Harry R. Hughes
References
External links
Official website Maryland MVA Biographies of former Secretaries