He was the son of William and Isabella Jane Kearney. In 1901 the family lived in house 82, Old Park Avenue, Clifton Ward, Belfast.
Kearney would have joined the Belfast Banking Company around 1910.
By 1911 the family property is known as house 60, Oldpark Avenue, Clifton Ward, Belfast. Herbert is described as a Bank Clerk.
On 28th September 1912, Kearney signed the Ulster Covenant at the City Hall, Belfast giving his address as 128 Oldpark Avenue, Belfast.
Kearney served as an Officer Cadet with the Officer Training Corps (OTC). The Belfast Banking Company 'Roll of Honour' records Kearney as being a 'Prisoner of War'.
Following his demobilisation after the Great War, Kearney returned to work eventually ending up in East End branch.
He also worked in Head Office. Kearney was a member of the Belfast Banking Company Sports Club on 27th March 1945 paying 5 shillings subscription.
Retirement came in 1953.
He died on 17th May 1970.