Seth Masket is a professor of political science at the University of Denver, where he also serves as an educator and researcher. His academic focus includes political parties, campaigns and elections, and state legislatures. He was a Senior Visiting Scholar at the Center for the Study of Democratic Institutions at Vanderbilt University in 2024-25.

Masket is the author of several books, including 'Learning from Loss: The Democrats 2016-2020' (Cambridge, 2020).