Managed metadata environments (MME) are being employed in organisations that need to assure a consistent and efficient capture, integration and delivery of enterprise metadata. Initiatives to implement a MME in an organisation may be a daunting endeavour and various information systems have evolved over time to support such environments. The expert study at hand used a multi-round Delphi research method in order to identify critical success factors of these initiatives. Out of the ten critical success factors nominated through the early rounds, nine factors were found to be very-toextremely important and one factor moderately important. The identified success factors can be used as a basis for implementation frameworks in metadata management initiatives. An effective and efficient metadata management system is one of the key components of data and information management, and can greatly aid organisations‟ efforts toward improved information quality and governance