Sir Andrew Sheppard Grimwade, CBE (26 November 1930 – 30 January 2023) was an Australian chemical engineer, scientist, philanthropist, businessman and cattle breeder.
His early business career was in Sydney where he was appointed to the board of Commonwealth Industrial Gases.
Since 1959, Grimwade has been Principal of the Green Valley Cattle Company, and in 1996 helped form Certified Australian Angus Beef Ltd, of which he became Deputy chairman and was involved in building it into Australia's leading branded beef program.
In the 1990s, Grimwade operated Turoa Ski Field on Mount Ruapehu in New Zealand's Central North Island.
Sir Andrew's management was burdened by the 1995 and 1996 Ruapehu eruptions and the unusually poor snow season of 1998.