As state manager of the company's Western Australian business, Wyndham had just returned dust ridden from a sales trip to Kalgoorlie when news of his brother Sid's death reached him.
Wyndham moved back to Angaston from Perth and became manager of Yalumba at the age of 30.
When Wyndham arrived at Yalumba, Australia drank Brandy, Sherry and Ports. His respect for European wines and their cultures led him to predict a swing in wine toward "table wines".
Post war immigration confirmed it and investments in viticulture followed at Oxford Landing Estate and the Eden Valley hills zone.
Described as an ebullient man, Wyndham loved people from all walks of life. Sport remained throughout his life an international key interest. Cricket teams enjoyed their rest days at Yalumba for many years. Wyndham became Chairman in 1975.