Davey was born in Lahore, India about 1881. When he enlisted in December 1915 he was a thirty four year old Hawker, living at Kelly’s Gully near Warialda. He was married and had two children. Davey joined the First Contingent of The Kurrajongs who left Inverell together in January 1916 for the Narrabri and Armidale camps.
He became a member of the 33rd Battalion A Company which trained at Armidale and Rutherford prior to sailing from Australia on HMAT A74 Marathon on 4 May 1916. After nine weeks at sea the Battalion arrived in England where further training was undertaken at Salisbury Plain before they were sent to France in November.
Davey became ill in France and in April 1917 was invalided to Connaught Hospital, Aldershot, England suffering from malaria. He was returned to Australia and medically discharged in October 1917. The authorities granted him a pension which included an allowance for his wife, Jane, and children. In 1919 he drew a soldier settler's block of 115 acres near Bega in southern NSW.
Private Davey Singh is remembered at Inverell where his name is inscribed on the town’s Honor Roll. His name is also recorded on the Warialda Rail Honor Roll.