Cultural observer

In the Federation, a cultural observer is a member of an observer team dispatched to a pre-warp civilization for research and assessment. In accordance with the Prime Directive of non-interference, the research is strictly covert. 

John Gill was a cultural observer working without teammates on Ekos in the 2260s. 

Nikolai Rozhenko was stationed on Boraal II as a cultural observer of the Boraalans in 2370.