Digital Government (e-Government) provides support for processes, activities and e-government resources within organizations involved through information and communication technology (ICT), focusing on value delivery to citizens. Collaborative business processes span several organizations, with different actors and heterogeneous technologies and systems, leading to complex interactions within different e-Government models and available technologies. Business Process Management (BPM) provides support for the business processes lifecycle, defining phases and activities to provide services or products with value for end users. Successful inter-organizational processes management and enactment within e-Government collaborative organizations will lead to better conceptual and technological integration, not only with each other but with citizens and users in general. Although in the last decades many advances have been made in the integration of BPM foundations and technological platforms to e-Government settings, several challenges still remain open.