Victorian MP Kaushaliya Vaghela has resigned from the Labor Party, weeks after levelling serious allegations of bullying against her former party.
Ms Vaghela has accused the office of Premier Daniel Andrews of turning a blind eye to systemic bullying over a number of years.
She told 7.30 she raised the allegations several times from April 2019 onwards in writing and in person with the Premier's office.
She said she lost her self-esteem and felt "worthless" as a result of the alleged bullying and intimidation.
WorkSafe is now investigating the claims.
The allegations were revealed publicly just days after Ms Vaghela crossed the floor to vote against her party.
The vote, brought about by disgraced MP and former factional ally of Ms Vaghela, Adem Somyurek, referred Labor’s 2018 "red shirts" rorts scandal to the ombudsman and IBAC.
It is against party rules to vote against the caucus and it is likely Ms Vaghela would have been expelled if she did not resign.
Ms Vaghela has been the Western Metropolitan member of the Upper House since 2018.
She was not re-endorsed for this year's election as part of a factional purge sparked by allegations of branch stacking.
It is expected Ms Vaghela will now sit on the crossbench until the election in November.
The government declined to comment on the resignation.
In a press conference in February, Premier Daniel Andrews told reporters: "There was an issue with a staff member. A complaint was made and the staff member no longer works in my office. That was dealt with appropriately."
