Organisations are increasingly leveraging improved decision making processes during the establishment of project teams. Beyond the obvious advantages of accessing qualified, cost-effective project staff, the issues of sustainability and governance are addressed when the virtual teaming approach is used. Projects can proceed without people needing to travel to a co-located work-place, thus saving time, effort and expense while creating less environmental pollution. But there is a governance problem; running virtual projects, particularly complex projects involve a greater degree of difficulty than managing co-located projects. What is needed are effective, practical methods for managing virtual projects. This paper introduces a new Reference Model of Organisational Behavior (RMOB) for the Leadership of Complex Virtual Teams which is arguably an effective way to meet the challenges of virtual teaming. This paper also discusses the new issue of sustainable leadership with mention of the proposed Organisation for Economic Cooperation and Development (OECD) Management indicators that point towards sustainable governance.