He is also the director and chairman of Habitat for Humanity Tauranga.
In 2001, he joined Te Tuinga Whanau Support Services Trust, which supports at-risk families, individuals and youths, and was trust chairman from 2002 to 2010.
Mr Brebner said he initially declined the prestigious medal.
"But we have a big family and my wife finally persuaded me it would be good for our children and grandchildren for me to accept it. I feel very honoured and humbled to be recognised in this way," he said.
Mr Brebner said it had been a great privilege to help to make a difference in people's lives.
"There is nothing better than attending a Habitat for Humanity hand-over ceremony or to give a lift-up to someone visiting the Foodbank, even if it only a week's worth of food," he said.
Mr Brebner has also been chairperson of the Waikaraka Estuary Management Committee, the Voice for Life Bay of Plenty Charitable Trust, and Saint Joseph's Te Puna Parish Council.