J. M. Mancini (Ph.D., M.A., Johns Hopkins; B.A., University of Virginia) is Senior Lecturer in the Department of History, Maynooth University (Ireland), and previously taught in the University of Sussex and in University College Cork.

Her most recent work, on architecture, religion, and regime change in the Philippine-American War, has been published in the Companion to American Art (Blackwell, 2015), and was the basis for a plenary lecture she delivered at the 2010 biennial conference of the European Association for American Studies. This work is part of a book she is writing entitled Art and War in the Pacific World. Other recent publications include Architecture and Armed Conflict, eds. J. M. Mancini and Keith Bresnahan (Routledge, 2015).

She has held fellowships from institutions including the Getty Research Institute, the Smithsonian Institution, the Huntington Library, the Paul Mellon Centre for Studies in British Art, and the AHRB (UK). Her academic awards include the 2012 Patricia and Phillip Frost Essay Award for the best article in American art, for "Pedro Cambón's Asian Objects: A Transpacific Approach to Eighteenth-Century California," The Smithsonian American Art Museum's 2008 Charles C. Eldredge Prize for Outstanding Scholarship in American Art, for Pre-Modernism: Art-World Change and American Culture from the Civil War to the Armory Show (Princeton, 2005), and the Yasuo Sakakibara Prize (American Studies Association, 2002).

She takes an interest in communicating academic perspectives to wider audiences, and has appeared on programmes including Newstalk Radio's Talking History, live coverage of the 2012 U.S. Presidential Election on RTÉ Television (the Irish national broadcaster), and the Virginia Foundation for the Humanities show BackStory, broadcast on National Public Radio.