He was a Resident of the American Academy in Rome (1979), and served as the American Academy in Rome's Mellon Professor-in-Charge of the School of Classical Studies (1981).
He was a Fellow of the American Academy in Rome (1950) and field director of the AAR's Cosa excavations (1952--55). He a Resident of the AAR (1979), and the AAR's Mellon Professor-in-Charge of the School of Classical Studies (1981).