WDC had a $218,000 contract with Northern Districts Security, which supplied two City Safe community officers during the day from Monday to Saturday and four officers from midnight to 4am on weekends.
WDC audit and risk committee chairwoman Sharon Morgan said all officers received general security training and their employer was investigating further training off the back of the October assault.
City Safe officers were warranted to enforce bylaws and could issue fines.
"They are a great team, security trained, who have developed really good relationships with the people who spend time in the mall, pass through it and work there," said Cr Morgan. "They know how to spot a problem, defuse it themselves or contact police."
One of the team, Hoki Witute, received commendations this month from the mayor and police when he tackled a knife-wielding youth to the ground and prevented him from harming others.
Cr Morgan, whose committee received reports on council staff safety once every three months, said WDC's direct risk-management and the safety of contractor staff were slightly different issues.
The report this month listed attacks on frontline customer service staff and the robbery of cashiers as among the riskiest parts of council's business, alongside noise-control staff.
"Our frontline staff have also received personal safety training," Cr Morgan said.
