Nigeria trade unions over the years have been known to improve their workers condition through dialogue. Recently, the effectiveness of trade unions has been faulted and trade union seen to have failed in its primary responsibility while others have cast the blame on the inabilities or shortcomings of the organizations. Based on the aforementioned, this study investigated the determinants of the strength and performance of trade union activities in multinational organizations using National Petroleum Development Company and Pipeline Product Marketing Company as case studies. The study here among its objectives – to determine the socio-economic characteristics of the workers in the organizations under study and to examine the strength of the trade union in the organizations The result from the study shows that the level of workers participation in the organizations is high and this to a large extent translates to the strength of the trade unions in the organizations which was scored high. Again, the high score may most likely be connected to the ability in meeting with the welfare needs of the workers. There were for reaching recommendation including the need for union members to participate fully in the organization.