Abstract: Although Enterprise System (ES) implementation (formerly Enterprise Resource Planning systems) literature is extremely broad, most of it takes the perspective of the implementing organisation and its employees, i.e., project managers, key users and users. The fact that it is both possible and popular to conduct such a complicated, time-consuming and expensive project using functional consultants is largely omitted. This study explores the Enterprise System implementation project from the perspective of the functional consultants and is based on the analysis of project documentation and interviews. The research questions answered by this study include the consultants’ requirements from other project participants, which help them to accomplish the goals of each project phase, to complete the activities performed in each project phase, and to deliver the products that are requested of them.