Dubbo College's Delroy Campus had a divisive culture and was "a horrible place to work", a former teacher who taught at the school has claimed.
After working at the school for more than a decade, the teacher quit in 2017 because they were allegedly bullied by another staff member.
"I left the school as I could not cope mentally anymore with what was going on...," the former teacher said.
"The bullying that I received was... horrific.
"Everyone had low morale and no one wanted to be there [working at the school]."
The former teacher said they would never be able to return to teaching again because of the bullying experience.
"I absolutely loved my role as a teacher and it deeply saddens me that I would not be able to return to it," they said.
"I was overworked and stressed and everything that I requested [to help cope] fell on deaf ears.
"The students in my class had suffered as the teaching was limited in what I had time to do."
The former teacher said they were speaking out about their experience to raise awareness of the impacts of workplace bullying and prevent it from happening to others.
"I don't think it's fair that anyone else should have to go through the bullying that I endured," they said.
"I should have stood up to my bully more, so that is something that I would encourage others to do."
The NSW Department of Education was asked to respond to the former teacher's claims and a spokesperson said bullying was not tolerated in schools.
"All staff are expected to meet the Department of Education's commitment to dignity and respect in the workplace and the principles detailed in the code of conduct," the spokesperson said.
"Any staff member with concerns can submit a complaint through the department's robust complaints handling process. All reports are treated seriously."
The spokesperson said if complaints related to a staff member's supervisor "the complaint will be investigated by a more senior departmental officer".
"All staff can access independent, free, confidential, counselling support through the employee assistance program," the spokesperson said.