On 17th July 1900, McCready joined Northern Bank at Head Office. Transfers followed to Ballinamore (1901), Londonderry (1902), Head Office (1902), Lisburn (1903), Holywood (1911), Oldcastle (1912) and Head Office (1914).
In 1901, McCready is boarding in house 15, Main Street, Ballinamore. He is recorded as a Bank Official. By 1911, he has moved to Holywood and is boarding in house 13, Marine Parade, Holywood, Co. Down. His occupation is recorded as a Bank Official.
On ‘Ulster Day’, Saturday, 28th September 1912, a William McCready signed the Ulster Covenant at Articlave Orange Hall, Belfast giving his address as Sconce.
On 5th December 1914, McCready volunteered and enlisted into the 24th (Sportsman’s) Bn. Royal Fusiliers as a Private for the term of the war. He served in the British Expeditionary Force and was promoted to Lance Corporal. His service was in the Somme 1916, Guillemont and Vimy Ridge before he became a Prisoner of War in Germany. Demobilisation came in February 1919. He was awarded the 1914/15 Star, the British Victory Medal and the British War Medal.
On 20th February 1919 he rejoined the Northern Bank at Londonderry. Transfers to Newry (1919) and Head Office (1922) followed.