The MIA's health staff are set to walk off the job for four hours on August 1 to protest safety issues in public hospitals.
The Health Services Union NSW is demanding safer workplace for its members, which include paramedics, cleaners, caterers, allied health professionals and administrative staff.
The HSU has 22,000 members and 811 members in Murrumbidgee Local Health District.
The union is demanding an extra 250 security officers be employed to protect health workers, who reported around 40 assaults in hospitals each month.
"Enough is enough. We are sick of the reviews and talkfests," HSU NSW secretary Gerard Hayes said.
"Our members are sick of being treated as punching bags. We do not take this strike action lightly, it really is a last resort.
"We've seen too many people stabbed, too many people shot, too many people who have been spat upon or punched, too many people getting PTSD because they went to work."
A NSW Health spokeswoman said workers compensation claims for assault were falling and crime statistics didn't reflect the union's claims of violent attacks.
"The safety of staff, patients and visitors to NSW public hospitals is paramount; there is never an excuse for violence in NSW Health facilities," the spokesperson said.
"There has been an increase in security staff across NSW from 974 full time equivalent staff in 2010 to 1243 in 2018."
As well as extra security, the spokesperson said $19 million of improved security had been spent on emergency departments and $5 million had been spent on personal alarms.
"NSW Health will seek the assistance of the NSW Industrial Relations Commission to resolve any planned industrial action by the HSU," they said.
Member for Murray Helen Dalton supported the actions of the HSU and said the state's health system was "broken".
"Brad Hazzard has had ample time to address these issues," Mrs Dalton said.
"Most people don't want to go on strike, but you want to be listened to."
Mrs Dalton said health services staff had been doing good work but under difficult circumstances and she had seen the impact it had on people.
A petition has been created and needs another 5000 signatures to reach 10,000 so it can be debated in state parliament.
Mrs Dalton said it was about ending a culture of bullying and getting a needs-based audit of services.
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