He left school early and became a carter (a transporter of goods) in Montreal; he was joined in business by his brother Louis.
In 1841, he married Marie-Sophie Lefebvre.
He opened a store in partnership with his brother in 1847.
In 1850, he moved to Quebec City, where he opened a store, operated flour mills and owned schooners operating on the Saint Lawrence River.
Renaud was a director of the North Shore Railway, the Union Bank of Lower Canada, the Quebec North Shore Turnpike Roads Company, the Richelieu and Ontario Navigation Company and the Quebec and Gosford Railway, which later became the Quebec and Lake St.
John Railway; he also helped found the St.
Maurice Railway and Navigation Company, the Salaberry Navigation Company of Montreal, the St.
Lawrence Navigation Company, the Quebec Marine Insurance Company and the Quebec and Lake St.
John Lumbering and Trading Company.
He constructed warehouses and docks and also acquired several large properties at Quebec.