She left the Army the next month, but from September 1943 worked in the Department of Manpower Directorate (Victoria)'s nursing control section.

[1][2] Following the outbreak of World War I, Wilson joined the Army Nursing Service Reserve in October 1914 and became the principal matron of the 1st Military District.

The ship carrying the nurses stopped at Alexandria during this voyage, where Wilson learned that one of her brothers had been killed at Quinn's Post in Gallipoli.

[2] Wilson was also offered the post of Matron in Chief at AIF Headquarters in either late 1915 or early 1916, but turned it down as she wished to remain with the 3rd AGH.

[2] Wilson was temporarily appointed the Matron in Chief at the AIF Headquarters, London in September 1917 while Evelyn Conyers was on leave in Australia.

[2][7] Following the war, Wilson was mentioned in despatches again in December 1918, and was appointed to the Commander of the Order of the British Empire (CBE) on 1 January 1919.

[2][8] Wilson travelled again to London in 1937 to lead the AANS contingent at the ceremonies which marked the coronation of King George VI and Queen Elizabeth.

[15] She was appointed the executive officer of the Department of Manpower Directorate (Victoria)'s nursing control section on 15 September 1943.

[2] In this role she controlled the staffing of all hospitals in the state of Victoria, and had a personal staff of four trained nurses and eleven office workers.

[16] Wilson retired following the end of World War II, but continued to work on a voluntary basis for a number of organisations.

[20] Her World War I service was depicted in the 2014 television miniseries ANZAC Girls, in which actress Caroline Craig was cast as Wilson.

[21] In 2019, Grace Wilson along with Vivian Bullwinkel, were memorialised in mosaic banners installed at the Repatriation General Hospital at Heidelberg, Victoria.