This is a report prepared for Cornell Conference on Women and Union Leadership held at Cornell University, New York City on May 8th 2010 and for Queen Mary/SERTUC Workshop on Women and Union Leadership held at Congress House, London on 11th September 2010. The project was funded by the Leverhulme Trust. [Excerpt] This report offers the first findings of a unique comparative research project on women in union leadership in the UK and the USA. It is the first study that seeks to systematically investigate the experiences of women in union leadership in two countries using the same research methodologies and carried out by an American/British research team.