Tiernan Brady is an Irish-Australian political and LGBT rights campaigner who was involved in the campaigns to allow same-sex marriage in Ireland and Australia. He was the Executive Director of the Equality Campaign in Australia, the successful national campaign for Australian Marriage Equality. He was the political director of Ireland's successful "Yes Equality" campaign which saw Ireland become the first country in the world to introduce marriage equality by a public vote. He was the Director of Gay HIV Strategies in GLEN – The Irish Gay and Lesbian Equality Network, and is Campaign Director of Equal Future 2018.