Networked arrangements have moved from the periphery to the centre of public policy making and now occupy a position alongside of government as key mechanisms for social and organisational integration. Despite the current prominence of networked arrangements, little is known about how networks are actually formed and what explains their structure, operation and management strategies. Moreover, despite the pivotal position as the architects, administrators and facilitators of the network reform process, the role of central agencies of government in networked environments has yet to be fully determined. The purpose of this thesis was to examine the variation in networked arrangements and its effect on design and management and, in doing so, uncover the emergent role of central agencies of government. Using a mixed research design of case study and network analysis, this thesis 'unpacked' three exemplars of cross-sector networked arrangements within the Queensland human services arena. The research produced a number of findings. First, it provided empirical evidence to support the previously largely descriptive proposition that networked arrangements are differentiated. Second, through the synthesis of two parallel integration literatures, a framework to guide the design of networked arrangements was produced. Third, it identified a set of network management strategies and demonstrated that these horizontally oriented strategies were different to those currently utilised within government. Finally, the research developed a set of general and specific roles to guide central agencies' operation within the current networked environment.