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 focuses on American and transatlantic anarchism, immigrant radicalism, radical movements and social space, German and French-speaking immigrants in the Americas.

I am currently preparing an anthology of selected writings of Johann Most, the German American socialist and later anarchist. My biography of Most will come out in September 2025 with University of Illinois Press.

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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.