Liam is an early American historian who specializes in the broad Revolutionary era (ca. 1760-1830) and has been a University of Maine faculty member since 1997. He helps organize the annual Maine National History Day contest for grade 6-12 students from across the state, previously served on the Board of Directors of the Maine Humanities Counci, was the Director of the Clement and Linda McGillicuddy Humanities Center at the University of Maine from 2014-2016, and has been part of the MSF Programming Team and Chair of humanities-science forums at the Maine Science Festival since 2015 .
Liam has done considerable public history work to commemorate the bicentennial of the state of Maine in 2019-2020, including organizing a public scholarly conference on the statehood era and its legacy (May 31-June 1, 2019); helping to organize the annual Maine National History Day a contest for grade 6-12 students; service on the Board of Directors of the Maine Humanities Council (2010-2017). He is currently a member of the City of Bangor’s Historic Preservation Commission.