| Place of birth | Melbourne Victoria |
| Religion | Roman Catholic |
| Occupation | Medical practitioner |
| Address | East Caulfield, Victoria |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Father, J O'Brien, 23 Erica Avenue, East Caulfield, Victoria |
| Previous military service | 49th Infantry |
| Enlistment date | 10 April 1918 |
| Rank on enlistment | Captain |
| Unit name | Staff for No.1 Hospital Ship 'Karoola' |
| AWM Embarkation Roll number | 26/104/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A61 Karoola on 14 July 1915 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A67 Orsova on 17 July 1915 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 18 December 1915 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board No 1 Hospital Ship Karoola on 20 May 1916 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 27 May 1916 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board No 1 Hospital Ship Karoola on 10 August 1916 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 19 August 1916 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 9 December 1916 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 25 April 1917 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board No1 Hospital Ship Karoola on 10 September 1917 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 12 September 1917 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 23 January 1918 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 23 March 1918 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 12 June 1918 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 18 September 1918 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board No 1 Hospital Ship Karoola on 26 February 1919 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A61 Karoola on 14 July 1915 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A15 Port Sydney on 5 November 1917 |
| Rank from Nominal Roll | Captain |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Fate | Effective abroad (still overseas) |
