This paper examines the use of so called 'double breasting' as a means of union avoidance among multinational companies (MNCs). Double breasting refers to the practice whereby multi-establishment organizations simultaneously operate establishments on both a union and non-union basis. Using survey data from the largest and most representative empirical investigation of employment practice in MNCs in Ireland to date and supplemented by qualitative data gathered from case based investigations in the subsidiary operations of American owned MNCs, we profile the incidence and pattern of this particular form of union avoidance as well as providing insights on management's rationale for so doing. Our findings suggest that a substantial and increasing number of unionized MNCs in Ireland are engaging in double breasting. This phenomenon is most evident among U.S. MNCs. We also find that employers, at both local and global level, has proactively initiated double breasting as a strategic ploy to increase management prerogative and better position subsidiary operations to attract new investment from corporate levels.