Ki Mendrossen in "Sarek"

In the TNG episode "Sarek", Ambassador Sarek arrives on the Enterprise-D with a small entourage that includes a Terran male named Ki Mendrossen, who introduces himself to Picard and Riker as Sarek's Chief of Staff.

Is Mr. Mendrossen a human who has studied the teachings of Surak? Mendrossen betrays no emotion (or very little emotion) in his dealings with Sarek's group and with the Enterprise crew. Furthermore, he wears a Vulcan ceremonial sash and Vulcan-style clothing. Perhaps these features are simply part of the procedure one must follow when working amongst Sarek's staff, regardless of his or her own culture. Still, I am curious about humans who have studied Vulcan teachings and abide by their way of life (in-universe). Is there further evidence that Mendrossen is one such person?

There is a Memory Alpha article regarding Mendrossen, but it contains little information other than what is in the episode.