Gabhan graduated from Trinity College Dublin in 2021. He moved to London to undertake an LLM in Environmental Law at University College London. Since graduating, he has completed internships at Southwark Law Centre, focusing on unequal impacts of development on South London communities, and at Friends of the Earth, where he gained experience in a wide variety of climate litigation. He joined Richard Buxton Solicitors in November 2024, to work in these two interest areas of planning and environmental law.