John E. Irving, CM (born 1932) is the youngest son of billionaire industrialist K.C. Irving. Jack, which he is referred as, along with his brothers J.K. and Arthur, share the ownership of what is known informally as the Irving Group of Companies.
Following their father's death in 1992, ownership and responsibility for the Irving companies was divided as follows:
All companies within the Irving conglomerate are vertically integrated and buy services and products of other companies, thereby maintaining profits within their operations.
An avid conservationist of ecological and cultural areas, Jack Irving is also a strong supporter of the arts in Atlantic Canada.