Mark teaches at The Citadel in Charleston, SC. His scholarship examines how institutions operate and how policies shape public attitudes. He is also the Book Reviews Editor for Public Opinion Quarterly.

In 2022, he was a co-author of the book Battle for the Heart of Texas: Change in the Electorate. His survey work for the Dallas Morning News/UT Tyler Poll contributed to that book and was cited by The Late Show with Stephen Colbert, FiveThirtyEight, The New York Times, Austin American-Statesman, Dallas Morning News, Texas Monthly, Texas Tribune and more.

Prior to teaching at The Citadel, he was an associate professor at The University of Texas at Tyler and visiting assistant professor at Bates College.