Gribben was born in County Down, Ireland, and in the 1911 Census was recorded as resident at Dunnanew, Rossconor, unmarried, aged 23, and working as a draper's assistant in Castlewellan. He was living with his mother Alice Gribben, father Thomas, and six siblings.
Gribben joined the army soon after the outbreak of World War I, being commissioned as a second lieutenant in the 5th Battalion, Royal Irish Rifles on 15 August 1914. He was promoted to lieutenant on 22 May 1915, and was later seconded to the Royal Flying Corps to train as a pilot, being appointed a flying officer on 24 December 1916. Gribben was posted to No. 70 Squadron in early 1917. He flew a Sopwith Camel to score five victories between 17 July and 13 August, his final tally being two enemy aircraft destroyed, and three driven down out of control. On 9 September, he returned to England to serve with No. 44 Squadron as a night fighter pilot flying a Camel. On 26 September he was awarded the Military Cross, which was gazetted on 8 January 1918. His citation read: ;Military Cross On 1 January 1918 he was appointed a flight commander with the temporary rank of captain. Gribben then served as a test pilot at the Royal Aircraft Establishment at Farnborough. He returned to combat on 2 October 1918 as a flight commander in No. 41 Squadron. Two days later, he and his Camel were badly shot up by a Fokker D.VII; although wounded in the arm, Gribben crash-landed safely.
Inter-war career
Gribben left the RAF on 24 January 1920, being transferred to the unemployed list. He relinquished his army commission in what was now the Royal Ulster Rifles on 1 April 1920. On 4 May 1920 he was granted a short service commission in the RAF with the rank of flight lieutenant, but this was cancelled on 10 August 1920. Gribben return to the military when appointed a captain in the 18th Battalion, London Regiment, a Territorial Army unit, on 15 March 1930. On 1 November 1934 he was promoted to lieutenant colonel. On 1 November 1938 Gribben retired from the London Irish, giving up his command.
World War II and after
Just prior to the outbreak of World War II Gribben joined the Royal Air Force Volunteer Reserve, being commissioned as a flight lieutenant on 1 September 1939. He was promoted to squadron leader on 16 December 1941. He remained a member of the Air Force Reserves post-war, finally relinquishing his commission on 10 February 1954, at the age of 65.
