After leaving Hyndland School in 1945, Isi's professional career as an architect began with taking evening classes in architecture at the Glasgow School of Art[REF] and an apprenticeship under Jack Coia[REF] at Gillespie, Kidd & Coia.
When Andy MacMillan joined the firm in 1954, the pair designed many churches, colleges & schools together in the Modernist style [REF].