From Halopedia, the Halo wiki
November 3, 2552 (presumed)
Covenant (former) Joyous Exultation Covenant
Zasses 'Jeqkogoee was a Sangheili warrior of the Covenant's highly respected Dn'end Legion and the navigation officer of the ORS-class heavy cruiser Incorruptible. He later became a member of the Joyous Exultation Covenant, seeking revenge against the Jiralhanae for their betrayal of the Sangheili at Installation 05.
On November 3rd, 2552, he was aboard the ship when it escaped the Battle of Installation 05 to Joyous Exultation following the beginning of the Great Schism. He was aboard the Incorruptible when it traveled to Onyx, where he was most likely killed in the Onyx Conflict.