In 1950 , he became an organizer for the CIO 's Oil Workers International Union and was sent to Alberta to organize workers in that province 's booming petrochemical industry .
There he joined a Congress of Industrial Organizations union organizing drive .
In 1950 , he became an organizer for the Congress of Industrial Organizations 's Oil Workers International Union and was sent to Alberta to organize workers in that province 's booming petrochemical industry .
There he joined a Congress of Industrial Organizations union organizing drive .