Weir returned to Australia at his own request in late 1916 at the age of 50, and in 1917 he was awarded the Distinguished Service Order and was mentioned in dispatches for his performance at Pozières and Mouquet Farm.
Weir returned to Australia at his own request at the age of 50 in late 1916, when he was appointed as the first South Australian Public Service Commissioner. In 1917 he was awarded the Distinguished Service Order and was mentioned in dispatches for his performance at Pozières and Mouquet Farm.