Liaison officer
From Memory Alpha, the free Star Trek reference.
A liaison officer was usually a spokesperson who represented the interests of his or her government.
Kira Nerys was the Bajoran liaison officer onboard the space station Deep Space 9, representing the Bajoran Provisional Government and the Bajoran Militia when the Federation helped rebuild it.
One job of the liaison officer aboard DS9 was to compile the material subsistence report, a job that Commander Sisko had to do when Kira was unable to assist him. (DS9: "Progress")
Julian Bashir acted as a liaison when the Federation ambassadors Taxco, Lojal and Vadosia visited Deep Space 9 later in the year. (DS9: "The Forsaken")
Li Nalas was Deep Space 9's liaison officer for a brief period in early 2370. It was shortly after his return from prison on Cardassia IV. (DS9: "The Homecoming", "The Circle", "The Siege")
