During 2014 and 2015, in the lead up to the referendum of the Thirty-fourth Amendment of the Constitution of Ireland, known as the Marriage Equality referendum, Hoey used her role as USI Equality and Citizenship Officer to mobilise students across the country. She organised USI's flagship Pink Training event in Cork in November 2014. The weekend conference focused heavily on training students in campaigning for a Yes vote and it was attended by a record number of students. In the months leading up to the vote in 2015, Hoey traveled across the country conducting training events for students on messaging and canvassing. Hoey's mobilisation work accumulated with an idea of a ‘voter motor,’ a campaign that was launched by USI in the final week of the campaign to encourage people to give their fellow citizens a lift to the polling stations.