Dorota A. Grejner-Brzezińska (born 1963) is a Polish-American geodetic engineer known for her work on the Global Positioning System. She is University Distinguished Professor and Lowber B. Strange Endowed Chair in the Department of Civil, Environmental and Geodetic Engineering at Ohio State University, and director of the Satellite Positioning and Inertial Navigation at Ohio State, where she is also associate dean for research in the college of engineering and senior associate vice president for research of the university.