Star Wars: How EVERY Jedi Got On The High Council
27. Tera Sinube
Not much is known about how this elderly Jedi made his way onto the Council. What we do know is that he once taught future Council members Dooku and Sifo-Dyas as younglings, and was a close friend of Yoda, who by the time Sinube joined the Council had been long established as the Grand Master.
He served on the Council for around thirty five years before stepping down to spend less time involved in Jedi affairs.