Grainne has worked for Arcadia since 2002. Her main responsibilities include coordinating and planning student orientations such as intercultural discussions and activity as well as preparing students for practical life in Ireland. Grainne informs health policy for Arcadia programmes in Ireland and responds to any physical or psychological health issue students may have during their time in Ireland. She works closely with the Resident Director and oversees the work of the Student Life Officer to ensure students are supported academically, culturally and personally during their time in Ireland. She also oversees the planning of co-curricular events in Ireland.

Gráinne has a particular interest in mental health issues and is a fully trained counselor and psychotherapist with professional membership and accreditation with the Irish Association of Counseling and Psychotherapy (IACP). As part of her Post-Graduate counselling studies Grainne completed a dissertation on the "Stress Impact of Study Abroad on American students in Ireland". She continues to be involved in counselling.