Complex sentence: After graduating, he worked as a political organizer at the Fianna Fáil party headquarters in Dublin before returning home to Carndonagh upon the death of his father to run the family farm.
Split into simpler sentences: After graduating, he worked as a political organizer at the Fianna Fáil party headquarters in Dublin. After the death of his father, he returned home to Carndonagh, Co. Donegal, to manage the family farm.