Career
Petronius originally came from a wealthy family of Equestrian order, possibly from Egypt. He became a prominent politician during the reign of Roman Emperors Hadrian (117-138) and Antoninus Pius (138-161). From 133-137, he served as Prefect of Egypt and in 139-143 served as Praetorian prefect in Rome.
Due to his outstanding service, Antoninus Pius promoted him to Senatorial rank.
Antoninus Pius awarded Petronius the suffect consulship of 150.