In this paper, the author aim to identify and classify the main issues and challenges facing different business organizations when implementing Data Warehouse (DW) technologies. This is highly significant given the theoretical and practical implications and importance of such technologies. It is also important to highlight these challenges given the scarcity of research in this domain despite its value. To determine DW issues and challenges, a qualitative research methodology was followed. A semi-structured interview protocol was used with 17 DW project managers and seniors' members.