This thesis is an attempt to explore the possibility of remedies for the right and representing interests of indirectly employed non-regular women workers in unstable employment and poor working conditions. The subjects of this study are the indirectly employed call center workers' labor unions that form complex labor-management relations in the subcontract structure and have disadvantageous employment conditions. This is because it examines how indirectly employed workers solve structural problems through labor union activities. The call center labor unions, which are the subjects of this study, belong to the Korean Public Service and Transport Workers' Union(KPTU) and are classified into private and public sector according to the purpose of the study. The call center labor unions in private sector are labor unions of three subcontractors working at F bank, and the other labor union in public sector is the single call center labor union working at D public institution which is the quasi-governmental agency. As one element of 'Strategy Capacity', which is the analysis framework of this study, is 'leadership', the executives of the labor unions were selected as the main research participants and the union members were also included in the interview to analysis the organization structure and the interaction with leadership. The research methods are in-depth interview, literature analysis, and participant observation.

The call center labor unions succeeded in organizing workers by personal and social factors and has become the subject of the labor movement. The call center unions set a good precedent in that the workers themselves improved the employment conditions and the working environment. In particular, indirectly employed workers in the same call center industry have formed creative strategies that fits their respective situations and 'Strategy Capacity'. Therefore, this study suggests call center labor union as one of the success stories of indirectly employed non-regular women workers' unions.