Sarah A. Mustillo, department chair and professor of sociology at the University of Notre Dame, has been appointed I.A. O’Shaughnessy Dean of the College of Arts and Letters by University President Rev. John I. Jenkins, C.S.C. She succeeds John T. McGreevy, who is stepping down July 1 after serving 10 years as dean. An expert in the social causes of childhood mental illness and statistical methods used in social science research, Mustillo joined the Notre Dame faculty in 2014, after serving seven years as a professor of sociology at Purdue University and six years on the faculty at Duke University School of Medicine. She has served as chair of the Department of Sociology since 2016.