McEwan worked for the
Alloa Coal Company and merchants
Patersons. He worked in
Glasgow for a commission agent and then as a bookkeeper for a spinning firm in Yorkshire. From 1851 he received technical and management training from his uncles, John and David Jeffrey, proprietors of the Heriot brewery in Edinburgh. In 1856, he established the
Fountain Brewery at
Fountainbridge in Edinburgh with money from his mother and his uncle, Tom Jeffrey. After growing sales in Scotland, his nephew William Younger of Alloa began an apprenticeship with him and eventually became managing director. Exports were made to Australia, South Africa, New Zealand and India, with
McEwan's having 90% of sales in north-eastern England by the turn of the century. but declined a title. ==Personal life==