The race to lead the National Education Union (NEU) – which represents about 450,000 school staff – will be between former president Daniel Kebede and deputy general secretary Niamh Sweeney.
Dr Mary Bousted and Kevin Courtney, the present joint leaders, will stand down this year, having run the union since its 2017 formation from the National Union of Teachers (NUT) and Association of Teachers and Lecturers (ATL).
The union will now be led by one general secretary. An election will be held after two candidates emerged from a nominations process that closed last month.