A fragmentary inscription recovered from Ostia Antica[4] was restored by M. Cébeillac Gervasoni and F. Zevi to show Dioga was also praefectus vigilum.
Robert Sablayrolles proposed this solution: noting that under the Severian emperors, prefects of the vigiles enjoyed exceptional favor with the emperors, one could think that during this period it took precedence over the praefecti annonae; Sablayrolles dates his tenure as starting in 215 or 216, succeeding Lucius Valerius Datus who held the office from Summer 213 to no later than 216; Dioga's tenure would have extended no later than 217, when Valerius Titanianus is attested as holding it.
The next known appointment was his commission as praefectus of the Classis Pannonica, a fleet of river boats that patrolled the Danube above the Iron Gates, whose headquarters is believed to be at Taurunum.
[10] There is no mention of Dioga commanding a cavalry ala, the expected third step of the tres militiae; Sablayrolles speculates that the line listing this may have been lost from both inscriptions.
[9] Over the next decade Dioga held a series of appointments with increasing importance: procurator of the imperial properties in Alexandria; ab epistulis graecis; a libellis; and last a rationibus.