Sego was the Grand Master of the New Jedi Order from 2,020 to 2,055 ABY. He succeded Hi Pung after his death. He led the Order through the New Clone Wars, and the beginning of the Jedi Extermination Wars. He did not trust Samuel Harmon who was Chief of State of the Galactic Alliance and later learned to be the head of the Reborn Sith Order. He was killed by Samuel Harmon, during the Sixth Battle of Coruscant in what was later recorded as one the the 5 most intense duels in the annals of history.