This paper explores the vendor transition process after the termination or alteration of existing outsourcing contracts and the impact on in-flight projects. A single case study based on a large Australian telecommunications company, which operates a heavily outsourced IT environment is presented. Qualitative techniques were used for data collection and analysis. Data collection was undertaken using on-site semi-structured open-ended interviews. The following key themes were uncovered in the interviews 1) Communication of the vendor transition, 2) The transition period, 3) Confusion during transition, 4) Extending agreements, and 5) Knowledge management. The paper concludes by presenting a number implications and underlying points of interest derived from the findings.