The purpose of this study is to investigate a large scale information systems change initiative at a Fortune 100 company. This study focuses on how Black Chemical Company (BCC) successfully implemented an information systems change across its global organization. Socio-technical systems methodology was used as an overlay to predict and explain the outcomes of the information systems change initiative that BCC carried out. Results show that the technological change implemented at BCC was successful due to the change methodology. This study aims to show the relationship between BCC's change methodology and socio-technical systems methodology, leaderships' effect on the implementation of the MIS, employees' relationships within and outside BCC, and the implementation strategy of the implementation methodology. A model of Social-Technical Systems Methodology (STSM) will be shared along with the need to incorporate STSM into future MIS implementation strategies.