I am a Professor of History at Salisbury University where I teach U.S. history survey courses, upper-level courses in immigration, labor history, U.S. Gilded Age, social and cultural history, history of drinking, and a graduate seminar in 19th-century American radicalism. I am an editorial board member of the journal Anarchist Studies.

My research and writing focus on the American and transatlantic anarchist movement in the 19th and 20th centuries. I am particularly interested in German and French-speaking anarchists in exile. I have published about Johann Most, Friedrich Kniestedt, Rudolf Rocker, and radical social space.

I received my Ph.D. in History from the University of Leuven, Belgium in 2003.

I was born in Hasselt, Belgium, grew up in Cologne (Köln), Germany and Genk, Belgium. I immigrated to the United States in 1997, and now live in Maryland.