Marc S. Seigar is an astrophysicist, academic and author. He is the Dean of the College of Natural Sciences and Mathematics, and a Professor of Physics and Astronomy at the University of Toledo. Seigar has published over 140 articles on topics related to galaxy structure and dynamics, galaxy morphology, and spiral structure. He is the author of 2 books entitled Dark Matter in the Universe and Spiral Structure in Galaxies, and has edited a volume on Structure and Dynamics of Disk Galaxies.