Moale Vi had pleaded guilty to a charge of grievous bodily harm after hitting Penisimani Fifita on the head with an iron bar and fracturing his skull.
Kaniva News reports the incident took place at the fire station in Longolongo on December 22, 2016.
Mr Justice Charles Cato said Vi’s counsel had provided information that indicated that Vi had been involved in a conflict with his fellow fire officers are returning to the station drunk.
During the struggle to restrain him, Fifita kicked Vi repeatedly in the head.
