Possums People

Dr John Possingham – Owner/CEO

Dr John Possingham is a research graduate of the University of Adelaide, Australia and Oxford University, England and has spent sabbatical periods at a number of Institutions and Universities including Edinburgh, Dusseldorf, Okazaki (Japan) and Bangladore (India).

He was responsible for formulating and directing the Federal Governements (CSIRO) program of horticulture research for 30 years. Dr John implemented the mechanisation of vine trellising, harvesting and pruning in Australia in the 1960′s. He is a member of the Order of Australia (AM), a Fellow of the Australian Institute of Agricultural Sciences (FAIAST), a member of the Russian Academy of Agricultural Sciences and a life member of the International Soceity for Horticultural Science. He is the author of some 250 published articles in grape growing, general horticulture and plant nutrition and has been a grape grower for over 25 years.

Carol Summers – Owner/Director

Carol is primarily responsible for export wine sales. She travels the globe extensively promoting Possingham & Summers wines at wine events and trade dinners. Her passion for fine wine has seen Quality in the vineyard and the winery become the primary focus.

Carol enjoys talking to cellar door customers whilst serving at the McLaren Vale Visitor Centre and is equally comfortable presenting our latest vintages to a delegation of buyers in Hong Kong and China. Carol provides important customer feedback to the winemaking team regarding wine styles and how to continually produce wines that exceed expectations. She has been a strong advocate for the winery to have the best resources available to produce award winning wine. This has been vindicated by a host of accolades from prominent wine writers and multiple awards at both Australian and International wine shows.

Ever the avid gardener, Carol holds an MBA, Law degree and spent her former years as the Deputy Divisional Director of the Flinders Medical Centre in South Australia. Carol is constantly followed by “wine dogs “Jules and Jussi, two very lucky King Charles Cavalier Spaniels.


Pieter Breugem obtained his B.Sc. Agriculture degree, majoring in Oenology and Viticulture, from the University of Stellenbosch, South Africa. He was appointed winemaker/viticulturist at Nuy Winery in Worcester.  At Nuy he had the privilege to work under highly acclaimed wine legend, Wilhelm Linde, who played a significant role in Pieter’s current approach to winemaking. Pieter gained international experience in winemaking by working several vintages at Sutter Home Family Vineyards, St Helena in the Napa Valley, before relocating to Australia. He began with Houghton Wines in Western Australia before transferring to Stonehaven Winery in the Limestone Coast as Production Manager.

Pieter took up the position as winemaker/viticulturist at Possums Vineyards in 2008. Having a small team he is totally hands on in all aspects of winemaking and viticulture on our properties at Blewitt Springs and Willunga. His experience in old and new world winemaking techniques is invaluable to Possums Vineyards as we seek to produce the best quality wines from Dr. John’s vineyards.

Martin is responsible for managing the Possums wine sales portfolio. He has a long background in Australian wine, previously working for Mildara Blass and Wine Solutions. Prior to his time in the wine industry Martin was a wool buyer for G.H.Michell & Sons.