The Guinness brewery in Dublin is one of the most famous tourist attractions in Ireland. On their website they have a section of interest to genealogists, employment records.
A search of the indexes shows that at least two Buggy’s worked there. 
Patrick Buggy: Born 14 October 1878/ Died Unknown/ Date Commenced Employment 3 December 1892/ Occupation Labourer
Julia M. Buggy: Born 4 August 1915/ Died 25 January 1988/ Date Commenced Employment 15 January 1943/ Occupation Dishwasher
More information, including employee numbers, can be found in the indexes.