Vulcan Security Directorate

The Vulcan Security Directorate or Ministry of Security was an agency within the Vulcan High Command during the 22nd century.

T'Pol worked for the Ministry of Security in the early 22nd century where she had met a few Klingon officials. 

In 2154 the security ministry investigated T'Les under suspicion of stealing classified documents from the Vulcan Science Academy, where she worked as an instructor. She decided to resign, instead of being fired. At this time and during the United Earth Embassy bombing later that same year, the chief investigator of the Directorate was Stel, until he was framed and arrested by the High Command for being a Syrrannite. 

Following Soval's termination from the Diplomatic Corps, he was instructed by Administrator V'Las to turn over any classified materials before he was to leave the High Command building.