Aponianus ended up supporting Vespasian, and as a reward he was appointed suffect consul during the early years of that emperor.
[2] His next office was as quaestor of the province of Sicily, and upon completion of this traditional Republican magistracy Aponianus would be enrolled in the Senate.
[3] The traditional Republican magistracy plebeian tribune followed, and after that praetor, which enabled him to hold important appointments.
Late in the year 69 Aponianus was commissioned legatus legionis or commander of Legio III Gallica.
[11] There is epigraphical evidence that, as a member of the curator riparum et alvei Tiberis, he was responsible for repairs made on the right bank of the Tiber River in 73.