James Leveson Ross, of Montreal, was a Scottish-born Canadian civil engineer, businessman and philanthropist. He established his fortune predominantly through railway construction, notably for the Canadian Pacific Railway, of which he was the major shareholder, and advising Lord Strathcona on railway projects in Argentina and Chile. He oversaw the electrification of street railways in Montreal, Toronto, Winnipeg, Saint John, Birmingham (England), Mexico City and São Paulo. He was president of the Dominion Bridge Company, the Mexican Power Company etc. He was Honorary Lieutenant-Colonel of the 17th Duke of York's Royal Canadian Hussars and Governor of McGill University and the Royal Victoria Hospital. He was an avid collector of the Old Masters and president of the Montreal Museum of Fine Arts. He owned several yachts including two named Glencairn and became the first Canadian to be made a member of the Royal Yacht Squadron. He funded the construction of the Ross Memorial Wing at the Royal Vic; the Ross Memorial Hospital and Nurse's Home at Lindsay, Ontario; and the Protestant Hospital for the Insane at Verdun, Quebec. He lived in the Golden Square Mile.

Dominion Bridge Company Limited was a Canadian steel bridge constructor originally based in Lachine, Quebec. From the core business of steel bridge component fabrication, the company diversified into related areas such as the fabrication of holding tanks for pulp mills and skyscraper framing.