Seigar, Marc S.

Marc S. Seigar is a British American astrophysicist, academic administrator, and author. He is the Dean of the College of Natural and Mathematical Sciences at the University of Maryland, Baltimore County (UMBC) effective August 3, 2026 and a Professor of Physics and Astronomy. He was previously the Dean of the College of Natural Sciences and Mathematics at the University of Toledo. Seigar is known for his research on the structure and dynamics of spiral galaxies, the relationship between spiral arm morphology and supermassive black hole masses, and his leadership in securing R1 research classification and large-scale federal funding for universities. He has published over 140 articles on topics related to galaxy structure and dynamics, galaxy morphology, and spiral structure. He is the author of two books entitled Dark Matter in the Universe and Spiral Structure in Galaxies, and has edited a volume on Structure and Dynamics of Disk Galaxies. Seigar is Fellow of the Royal Astronomical Society, a member of Sigma Xi, the International Astronomical Union, and the American Astronomical Society. He is also an Associate of the Royal College of Science.