Thomas Cuddie Brash was born to William Brash and Jane Parkinson Brash at Saddle Hill, near Dunedin, on 29 November 1874. His parents were descendants of Scottish settlers who lived in Dunedin, and they bought their own farm of at Mataura Island, Southland. Brash attended a small school near Yeovil, but had no formal secondary education.
Dairy years
Apprenticeship
At 15 he was employed by his uncles James and Richard Cuddie as a boilerman in their dairy factory at Mosgiel. While in Mosgiel he joined the Taieri Ramblers’ Cycling Club and became well known for his successful cycle races.
Management
In 1895 he was appointed first assistant manager at the Wyndham dairy factory, where he learnt cheese-making. Dairy expert John Sawers arranged for him a successful application for the position of manager of Totara Flat dairy factory, near Reefton. The four directors who met him off the train, astounded at his youth, advised him of the difficulties of managing a dairy factory on the West Coast, and offered him the chance to withdraw. Brash, however, set to work improving the quality of the operations. Many had complained about the sour taste of the factory's butter, and Brash had his staff spend three months cleaning the factory with immediate success.
Brash left Totara Flat in 1898 to become manager of the Maketawa dairy factory in Taranaki. In 1903 he became manager of the Waverley dairy factory, and later moved to the Kairanga dairy factory. He gained a reputation for his demands for meticulous cleanliness. He studied accountancy while in Waverley, and became a registered accountant in 1911.
Marriage & family
Brash married Margaret Henrietta Allen at Wyndham on 17 July 1901, with whom he had two daughters and two sons, the youngest of whom was Alan Brash.
National Dairy Association
In 1910 Brash and his family moved to Wellington where he joined the National Dairy Association of New Zealand as an assistant secretary. He was appointed the association's representative in London in 1919, and in 1921 returned to New Zealand to become secretary. He worked diligently to promote New Zealand dairy produce in Britain, and helped to establish the New Zealand Dairy Produce Control Board, for which he was appointed the inaugural secretary and chief executive for 16 years. He was also involved in the establishment of the Dairy Research Institute at Massey Agricultural College.
While in Wellington Brash became acquainted with leading Presbyterian minister James Gibb. As he got older he shifted his focus from agriculture and business to ecclesiastical matters. He continued as an elder, and by the end of his life had served the church for 51 years in that role. He was a church property trustee for 37 years and chairman of the trustees for 12 years. He chaired the Finance Committee, acted as convener of the Youth of the Church Committee in 1918, and in the 1940s was deeply involved in the Campaign for Christian Order. In 1944 he was only the second layman to be elected moderator of the General Assembly.
Brash and his wife spent the last years of their lives troubled by ill health, and moved to Christchurchto live with their elder daughter Pearl Bennett and her husband. Thomas Brash died on 19 January 1957.