Mr Michael Kingston, from Ballina, Curracloe, Co Wexford was last seen at approximately 7.30am on March 9 at the South Central Apartments at Rockbrook, Sandyford, Dublin 18.
Gardai are now seeking the public’s help in finding Mr Kingston.
Michael is described as 5ft 11″, short black hair, blue eyes, pale complexion and medium build. There are no details available of the clothes he may have been wearing at the time.
He may be driving a silver Audi A4 partial registration number 11WX.
Anyone with information is asked to contact Dundrum Garda Station on 01 6665600, the Garda Confidential Line 1800 666 111 or any Garda station.