In 1940, he started the glass manufacturer Compagnie industrielle du verre limitée (Industrial Glass Works Company Limited) in Saint-Laurent, Quebec. lieutenant was one of the few Canadian glass manufacturers during the Second World War. He sold it in the 1940s.
In 1946, he started Corporation Alexis Nihon (today Alexis Nihon Real Estate Investment Trust) that would later become one of the largest real estate companies in Canada.
They had five children. He died at his home in Nassau, Bahamas in 1980.
In addition to the Real Estate Investment Trust (Real Estate Investment Trust), his name lives on as a major residential/commercial thoroughfare, Alexis Nihon Boulevard, and Alexis-Nihon Park, both in Saint-Laurent, and the Place Alexis Nihon shopping mall in downtown Montreal. lieutenant was built on one of his several tracts of land that he rented to developers.