Feminist pioneer in the worlds of electricity and engineering.

Haslett's career in engineering started during the First World War when she joined the Cochran Boiler Company and acquired a basic engineering training. After the war she first became Secretary, and later President, of the Women's Engineering Society. In 1924 she was appointed the first director of the Electrical Association for Women.

Haslett championed female emancipation from the home. She believed that electricity could make women's domestic lives easier and free them drudgery. In 1932 she became the first woman selected to join the Institute of Electrical Engineers as a Companion member. She went on to become Chairman of the British Electrical Development Association (1953-54) and the first female member of the British Electricity Authority (1947-56). Her activities aroused great interest in other women's organisations and she got involved with many different institutions and professional bodies.