After he completed his duties as praetor, Secundus was admitted to the Fratres arvales, an ancient collegium revived by Augustus a century before.
Secundus is attested as serving as magister in the year 117;[7] the Acta Arvalia records his appearance at their rituals in January 118 and May 124.
[8] At the same time he was commissioned legatus legionis or commander of Legio XI Claudia, then stationed at Durostorum (modern Silistra).
This was followed by a second commission as legatus of Legio III Augusta, then stationed in Theveste (present day Tébessa) in North Africa; the unit may have relocated to Lambaesis while he was commander.
[9] Only one office after his consulship is known for Secundus, attested by the inscription from Alsiensis: curator operum locorumque publiorum, or overseer of the public works and places.