The health board was also found to have suspended Dr Hirini unfairly and that he was not given an opportunity to comment on allegations made against him before they were put to the New Zealand Psychologists Board.
The authority found Dr Hirini's resignation amounted to a constructive dismissal. The dismissal was found to be unjustified.
On January 18, 2012, Dr Hirini submitted a report stating he had been bullied in the workplace. He claimed the bullying was in response to an opinion he gave on a case file during a team meeting. He accused a member of the team of being aggressive and belittling him.
The authority said Dr Hirini's team leader not only failed to curtail the aggressive behaviour of the accused, but also supported it.
"The [report] said further that the threats and criticism were part of an overall pattern of bullying, but no other incidents were identified."
A second report, centred on the behaviour of the same two staff members, was filed in February 2012, which said their behaviour comprised the "overall pattern of bullying".
All parties met in March 2012 to discuss the complaints and a procedure for addressing them.
The two accused staff members were interviewed in April that year and both denied the allegations against them. They then raised their own concerns about Dr Hirini, stating he was the bully.
The health board tried to meet with Dr Hirini to discuss the complaints, but he declined to attend stating he did not have a sufficient understanding of what was to be discussed.
He was later sent a letter, which included details of their allegations.
In a letter dated May 16, 2012, Dr Hirini was provided with details of their allegations. "He was informed he was suspended while an investigation was conducted, although the parties later agreed he would work from home."
In May, concerns were also raised about aspects of Dr Hirini's case management.
The health board also tried to meet with him to discuss this, but Dr Hirini declined to attend until he had better information about the nature of the concerns.
On May 4, the health board sent a letter to Dr Hirini stating he was to have no further contact with patients until after the meeting. Dr Hirini then resigned. The authority found the breached duties to Dr Hirini had a cumulative effect, causing the resignation.
Neither Dr Hirini, nor the Bay of Plenty District Health Board, could be contacted for comment yesterday.