Eugene received his medical education at Queen’s College, Cork, and at at Edinburgh University, qualifying L.R.C.S., L.R.C.P., L.R.F.P.S. in 1898. He practiced as a civil surgeon in the UK during 1900 then joined the Medical Services, at the rank of Lieutenant on 29th January 1901. He first saw active service in the South Africa War of 1901-1902, taking part in the operations in Cape Colony, in Orange River Colony and Transval but was invalided. For his service there he received the Queen’s South African Medal & five clasps. From 1903 to 1907 he served in Malta, during which time he was promoted to Captain on 29th January 1904. In 1909 he became a Specialist in Midwifery & Gynaecology, then on 29th January 1913 he gained promotion to Major. Eugene entered the war in France on 15th August 1914, as the Medical Officer for the First Army Corps Headquarters. In August 1915 to August 1916 he became the Commanding Officer of No 18 Casualty Clearing Station, then became the Officer Commanding No 4 Casualty Clearing Station up until September 1916. During this time he was awarded the Distinguished Service Order for Distinguished service in the Field, as well as the French Legion of Honour, Croix de Chevalier on 24th February 1916. He also began to serve under the rank of temporary Lieutenant Colonel from 17th September 1915, which he held up until 5th April 1919. In September 1916, he was appointed the Medical Officer to the Commander in Chief, Sir Douglas Haig, and remained in this role until April 1919. During this time, on 3rd June 1918, he was created a Companion of the Order of St Michael and St George. From 1919 to 1925, he served in India - in a British Stationary Hospital at Kasauli and on 3rd April 1921 was Honorary Surgeon to His Excellency the Viceroy of India. Also during this time he was awarded the Roumanian Order of the Crown 3rd Class, on 29th September 1922, and was promoted to the rank of Lieutenant Colonel on 9th March 1923. On 18th February 1926, he became Honorary Physician to the King, as well as being promoted to Brevet Colonel. On 2nd March 1926, he was awarded the French Silver Medal de la Reconnaissance. He served in Shanghai in 1927, then retired with pay on 29th September 1930. He ceased to be on the Roll of Officers on 29th September 1933. He died in Cork.