He is the Joseph Regenstein Distinguished Service Professor of Virology in the Departments of Microbiology and Molecular Genetics and Cell Biology at the University of Chicago.

The family eventually made their way to the United States in 1948, where they settled in Philadelphia.

He subsequently attended the Johns Hopkins School of Public Health, where he received his Sc.D.

[1][2] Roizman joined the faculty at Johns Hopkins after graduation, and later spent a year as a visiting scientist at the Institut Pasteur in Paris.

[2][3] In 1999 he was involved in an inventorship dispute with a member of his research group, whose lawsuit was ultimately successful.