 Seleucus under Julian’s reign was made Comes by the emperor.In 361, Seleucus was sent to accompany the Praetorian prefect Priscianus to Euphratensis to do business as in the city, Seleucus held an administrative office as Priscianus was sent by the emperor to serve as role of governor in Euphratensis.In Euphratensis, Seleucus was a delegate of Priscianus as he was charged with levying uniforms and other supplies from the province.