This research work empirically assesses the relationship between the Quality Culture (QC) practices and core practices of Quality Management System (QMS) and investigates their direct and indirect influences on organizational performance. Data for this research work is collected from 80 Technical Services Organizations of Pakistan through mail survey and the proposed framework and hypotheses have been examined through Structural Equation Modelling. The results of hypotheses show that synergies among QCPractices have a positive impact on QMS-Core practices as well as organizational performance. Moreover, QMSCore practices mediate the relationship between QC-Practices and organizational performance. This empirically validated model can be used as a benchmark by future researchers for further examinations in other industries sectors, especially in manufacturing.