He said he received a phone call on Friday from his superior saying he needed managerial guidance as a result of a police investigation.
"I respect my managers and if they have to go about an investigation like that then so be it. If I have to be disciplined for something and they think I've breached the guidelines then I'll take that on the chin. I think it's a good thing that I engaged with the community; all I've had is support, even people I don't know ringing me," Joseph said.
He said he had informed his boss prior to the event that he would join in while policing the area with other officers.
"It was part of my duties so I rang up the offices and said I would go down to make sure everything was okay. But when it was happening ... I joined in. "
Thousands of Kiwis are stunning people with flash mob haka events around the world, even though some Maori say it's mocking their culture.
The flash mob haka is a secretly organised event, where lots of people unexpectedly perform the traditional war dance, and has become a new internet sensation.
Videos of flash mob haka events, which have taken place in New Zealand, Australia and even Spain, have been posted on YouTube.