That same year (1900), Gibb married Norah Isobel Monteith (1879-1940),[4] daughter of Fleet Surgeon John Lowry Monteith RN, and they had three sons,[5] including Lieutenant Colonel Alistair Monteith Gibb.[6]
Gibb later worked on the construction of the Rosyth naval dockyard where he is credited with accelerating the programme so that it was brought into use during the First World War.[1][3] In 1916, Gibb was appointed Chief Engineer of Ports Construction to the British Armies in France and Belgium, becoming Deputy-Director of Docks, British Expeditionary Force in France in 1917. During this time he prepared plans for the repairs of Belgian harbours, was responsible for the water supply for Belgium, and prepared special landing facilities for cross-channel ferries at Dieppe, Calais and Dunkirk.[3]
He joined the Ministry of Transport in 1919 as Director-General of Civil Engineering, and in the following years served on a number of committees including the Technical Committee on London Traffic (as chair), the Electrification of Railways Advisory Committee and the Light Railways Investigation Committee (as chair). Additionally he was a technical adviser to the Treasury on civil engineering schemes financed under the Trades Facilities Act and he was transport representative for the ministry on the Forth Conservancy Board.[3] In 1920 he was appointed Knight Grand Cross of the Order of the British Empire.[9]
He also wrote The Story of Telford: The Rise of Civil Engineering, a biography of the Civil Engineer Thomas Telford, to whom his great-grandfather John Gibb had been a deputy.[11]
Outside of engineering, Gibb served as Vice-chairman of the Managing Sub-Committee of University College London, sat on the Education Committee of the London County Council and was a member of the Council and Executive Committee of Princess Helena College.[3]
Gibb became less involved with his firm after 1945 and died at his home in Hartley Wintney, Hampshire, on 21 January 1958.[1]
^ abcdefghij"Obituary. Sir Alexander Gibb, 1872–1958". Proceedings of the Institution of Civil Engineers. 10 (1): 130–133. May 1958. doi:10.1680/iicep.1958.2021.