The leader of Sinn Féin is the most senior politician within the Sinn Féin political party in Ireland. Since 13 November , the office has been held by Gerry Background · Presidents · Vice Presidents · Parliamentary party leaders. Sinn Fein's leader in Northern Ireland Michelle O'Neill said she is disappointed that she will miss BBC NI's election debate due to illness. Singles Only. Applies to the next permanently appointed president of Sinn Fein after Gerry Adams. Caretaker will not count. Others on Request.