Stephen Robertson, an associate professor of history at the University of Sydney, will be the new director of the Roy Rosenzweig Center for History and New Media at George Mason University. Mr. Robertson, 45, was a postdoctoral fellow in George Mason's department of history and art history from 1998 to 1999. He will begin his new job in July.

Among Mr. Robertson's collaborative works is Digital Harlem, an interactive account of everyday life in that neighborhood in the early 1900s. The project won the American Historical Association's Roy Rosenzweig Prize for Innovation in Digital History in 2009 and an online-history award from a division of the American Library Association in 2011....