Former head of parks at Bristol City Council Alan Barber received the accolade for services to the environment.
Alan Barber was a CABE commissioner since the inception of CABE Space in 2003, but stepped down from the commission due to ill health last spring.
"I am thrilled to receive the award," said Alan Barber.
"I would like to thank all those who have supported the call for greater care to be taken of our parks, including Horticulture Week and all those nurses who have kept me alive to see the day."
Last year Bristol City Council honoured Alan Barber for his contribution to parks in the area with the opening of a rose garden named after him.
He continues to advise CABE on climate change and green space skills issues, as well as campaigning for more investment in high-quality green spaces
In the New Year's Honours List, Allan Rees was appointed MBE for services to the National Society of Allotment and Leisure Gardeners and to the Royal British Legion in Bridgend.