Praetorian prefect
He came from a family of humble origin, which, nonetheless, allowed him to start an administrative career. Claudian says that Theodorus was member of the court of a Praetorian prefect, as lawyer; historians think this was probably the Praetorian prefect of Italy, and that this office should be dated to 376. He was then governor of an African province, probably around 377, followed by "consularis" of Macedonia (c. 378).