Liaison officer
A liaison officer was a spokesperson who represented the interests of his or her government or other affiliation. They might operate on liaison protocol.

Section 31 assigned  to be their liaison officer on board the .  Faced with a choice of taking on either Tyler or , Captain Christopher Pike grudgingly accepted Tyler as the liaison officer. () 

In 2370, Deanna Troi was made Ambassador Loquel's personal liaison officer for the duration of the Iyaaran's stay on . ()

Kira Nerys was the Bajoran liaison officer on board the space station Deep Space 9 from 2369, representing the Bajoran Provisional Government and the Bajoran Militia which the Federation helped to rebuild. ()

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. ()

Julian Bashir acted as a liaison when the Federation ambassadors Taxco, Lojal, Vadosia, and Lwaxana Troi visited Deep Space 9 later in that year. ()

Li Nalas was made Deep Space 9's liaison officer by Jaro Essa for a brief period in early 2370. It was shortly after his return from prison on Cardassia IV. ()

A Cardassian liaison officer kept in close contact with Starfleet Admiral Kennelly during the crisis involving the Bajoran resistance leader Orta and his alleged attack on Solarion IV. ()

T'Rul served as a Romulan liaison officer assigned to supervise the operation of a cloaking device loaned to the Federation and installed on the  in 2371. ()

In an alternate timeline, when the  took 23 years to return to the Alpha Quadrant, B'Elanna Torres served as a Federation liaison to Qo'noS in 2404. ()

See also 
 Ambassador
 Convoy liaison officer
 Deputy liaison officer
 Fleet liaison officer
 Liaison

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Titles
Communication occupations