Before the Great Jedi Purge, Zackery was the head of the Senate security on Coruscant. He threw Keets Freely out of the Senate building on numerous occasions, and even found him in a Senator's office.
When the Empire took over, Zackery remained head of security, and, once more, caught Keets in a Senate office, along with Curran Caladian. After Zackery imprisoned them, the two managed to escape, using a gun that one of Dexter Jettster's old droid had brought them.
- Last of the Jedi: A Tangled Web (First appearance)