The author, John Dunn, began working with Comeng (Granville) in 1956 as an apprentice draftsman. He studied mechanical engineering at Sydney Technical College and then theology at the Adelaide Bible Institute and Sydney's Moore Theological College.
He attained the position of senior concept engineer in rolling stock design, working mainly in Comeng's Head Office at Granville. He was with the company until its closure in 1989, after which he continued to work for a further decade as an independent design, production and sales consultant for the new owners of the Victorian branch.
John Dunn's own consultancy company,Transit Design, secured railway rolling stock design work with numerous other clients in Australia as well as in Europe, Hong Kong, Japan and the USA. After retiring in 20(14 John Dunn has devoted much of his time to the research and writing of this history, and the pursuit of his responsibilities as a member of the ministry team at St Paul's Anglican Church, Chatswood, NSW.