Career papers of Lieutenant Commander Denis O'Brien, R.N.R.
Denis O'Brien was born in Cork, Ireland on 16 April 1919. He volunteered to join the Royal Navy in July 1935 and commenced service on 16 April 1937. He saw action during the Second World War, details of which are listed on the Certificate of Service in the Royal Navy in this collection (see D/BRI/1/1). At the end of his 12 years service, he moved to work in merchant shipping, but remained on the Royal Navy Reserve List (see D/BRI/2). At the time of his retirement his rank was Lieutenant Commander. During his Merchant Navy career he worked for, in no order, P.S.N.C., H.B. Lines, Canadian Pacific, P&O Ferries, Belfast Steamship Company and Coast Lines. He obtained his Master's Certificate of Competency for Home Trades in 1953 and worked mainly on routes between Belfast and Liverpool (see D/BRI/3). This collection also includes a number of postcards and photographs collected by Lieutenant Commander O'Brien, R.N.R., during his time at sea. For more details see attached list.