Arthur was born on 6 February 1866 in London, England to William McCormack and Matilda Winter.
[3] While at Panhard & Levassor in 1904 he was responsible for selling a 35HP car to the Sultan of Johore[4] showing that he had both mechanical and business acumen.
He entered a Gladiator car into the Gordon Bennett Trials on 23 May 1905[6] and then into the Isle of Man Tourist Trophy later that year.
One is Patent #: 18,168 where the assignee is The Wolseley Tool and Motor Car Company, Limited; Arthur McCormack Date: 1912 Title: Improvements in the Means Employed in Cooling Internal Combustion Engines of Aeroplanes and other Power-propelled Aerial Bodies.
[16] The development of these racing cars and work on the Viper engine caused Wolseley to be one of the first companies to make use of the overhead camshaft.
Receivers were appointed in 1926 and the following year W R Morris, later Viscount Nuffield, purchased the Wolseley business.
In 1926 he joined the board of ill-fated AC Cars (Autocarrier) in Thames Ditton[21] where he worked with Selwyn Francis Edge.