Margaret, Lady Moir, OBE (née Margaret Bruce Pennycook) (10 January 18645 October 1942) was a Scottish lathe operator, engineer, a workers' relief organiser, an employment campaigner, and a founder member of the Women's Engineering Society (WES). She went on to become vice-president and president of WES, and in 1931 president of the Electrical Association for Women (EAW), in which role she gave full expression to her belief that 'the dawn of the all-electric era' was at hand. She had no doubt about the importance of this development in freeing women to pursue careers outside the home: Moir was appointed an OBE in recognition of her work during the First World War in organising the Week End Relief Scheme for women workers and in raising money for the National War Savings Committee. As the wife of the prominent civil engineer Sir Ernest Moir (1862–1933), she described herself as 'an engineer by marriage'. She organised a simplified engineering course for women at several polytechnics, supported the work of pioneering women aviators such as Mary, Lady Bailey and Amy Johnson, and campaigned throughout her life for better access to employment for women. According to her friend and colleague Caroline Haslett, writing after her death in 1942, '[Britain] would have fewer resources in the numbers of trained women engineers and women knowledgeable in electrical matters if it had not been for the practical advice and interest, and also the financial support, of Margaret, Lady Moir.' Early life and family She was born Margaret Bruce Pennycook on 10 January 1864 at Gorgie, Edinburgh, to John Pennycook, quarry manager, and Margaret (née Davidson). On 1 June 1887 she married Ernest William Moir of South Queensferry at Dalmeny House. They had three sons: Reginald (Rex) born in 1893, who died in 1915 of meningitis; Arrol born in 1894, who on 14 June 1933 succeeded his father as 2nd Baronet Moir of Whitehanger; and Edward, born 1907, who died soon after birth. After their marriage, the Moirs lived mostly in London and, later, at Whitehanger, Fernhurst, Surrey, but travelled widely. Career Margaret Moir travelled all over the world with her husband as he undertook ever more ambitious civil engineering projects. She became closely involved in his work, calling herself an ‘engineer by marriage’. Among the many important ventures in which Ernest Moir played a part were the Forth Bridge, the Hudson River Tunnel, the Blackwall Tunnel and the