In 1919, as a result of an introduction by Sir Edmund T Whittaker, Mr Young left the academic world and became the representative in Bremen, Germany, of Messrs S M Bulley & Son, Cotton Merchants in Liverpool.
In 1926 after a successful period in business and having a desire to return to this country for family reasons he decided to change his career again and practise law in Edinburgh. He therefore returned to the University of Edinburgh and, after obtaining several distinctions, graduated LL.B. in March 1929 and became a Writer to the Signet later the same year. It is interesting to note that he served his apprenticeship as a Writer to the Signet under Dr E M Wedderburn then Professor of Conveyancing and thus renewed the links formed 15 years before in an entirely different environment. After qualifying Mr Young accepted a partnership in the firm of Messrs J & R A Robertson, Writers to the Signet.
Although his life as a solicitor absorbed most of his interest for the remainder of his life he retained an interest in the academic world both in law and science. In law he was an examiner in Conveyancing for many years and served on various committees and councils. In science he maintained an interest in the Edinburgh Mathematical Society and was elected a Fellow of the Royal Society of Edinburgh in 1937.
In 1947 he was elected Treasurer of the Royal Society of Edinburgh which he counted a signal honour in view of his desertion from the scientific field so many years before. He considered it no less an honour that his two predecessors as Treasurer had been Sir E M Wedderburn and Dr James Watt both of whom had been elected Fellows on the grounds of their scientific work and who had yet been practising solicitors in Edinburgh. He held the office of Treasurer for ten years and with his legal, business and mathematical experience his advice to the Council was invaluable. From 1958 until 1960 he served as a Vice-President. For his part he made no secret of the fact that he enjoyed the stimulation of the papers read to the Society at their regular meetings and the company he met there and at the Society's Dining Club. For the last few years before his death on July 20, 1968, he was unable to attend meetings owing to physical weakness but retained his critical mind throughout.