My father, Ian Mackintosh, who has died aged 97, enjoyed a distinguished career as a civil engineer for more than three decades before reinventing himself as a secondary school maths teacher in later life.
As a civil engineer, Ian worked for Halcrow, Taylor Woodrow and Balfour Beatty on projects as varied as Dungeness A nuclear power station, the Mangla dam in Pakistan, Kainji dam, Nigeria, and deep station excavation and tunnelling for the London Underground Jubilee line at Bond Street. In addition to numerous articles in professional journals Ian, who had an expertise in dams, was invited to speak at the 1964 International Congress on Large Dams in Edinburgh.
