Servius Sulpicius Similis (died c. 125) was an eques of ancient Rome who held several imperial positions, both civil and military, under Trajan and Hadrian, culminating with praefectus or governor of Egypt from 107 to 112.
One confirms the edict of an earlier prefect, Marcus Mettius Rufus, who ordered that copies of marriage contracts should be registered with all the documents about the husband's properties.
[9] It is believed that Sulpicius Similis also participated in Trajan's Parthian campaign during the years 113-114, and for his bravery was awarded dona militaria.
[10] He possibly returned to Rome after 114; Syme notes that "nothing is reported" about Similis when Trajan fell ill and died in Syria.
While his counterpart Attianus was soon removed from his position through an adlection into the Senate, Hadrian wanted to keep Similis as Praetorian prefect due to his loyalty and competence.