Ambassador Jetanien was a male Rigellian Chelon who served as a senior Federation diplomat in the 23rd century. Known as a wise and learned statesman, he was assigned in 2265 to Starbase 47, where he supervised a staff of envoys, attaches and aides to deal with diplomatic issues within the Taurus Reach.
While he had a wry sense of humor, particularly about the unpredictability of diplomatic matters, he was also a powerful orator and tough negotiator. He has a leathery dark green hide and is especially partial to Denebian shellfish broth. (VAN novel: Harbinger)
Jetanien spent much of 2267 away from Vanguard on Nimbus III, where he was attempting to draw Klingon and Romulan delegates together for multilateral talks. His efforts to hold a conference were finally successful in September of that year when Senator D'Tran of the Romulan Star Empire joined Jetanien and Klingon Ambassador Lugok on the surface. (VAN novel: Precipice)
After the riots in Paradise City that cost the life of Senator D'tran and damage to the Federation Embassy in 2268, Jetanien officially took a leave of absence from the Federation Diplomatic Corps; however, he continued to serve as an unofficial, back-channel negotiator between the Federation and both the Klingon and Romulan Empires.