Collection development is big business and how academic libraries decide to invest in content is radically changing. This is being driven as much by new approaches to organisational design, relationship management, and data insight in universities as by changes to business models and technology in scholarly publishing and the supply chain. Based on recent experience at Edinburgh, Manchester and Northumbria, this participatory session will explore new strategies for collection development, and specifically address challenges and opportunities faced by libraries that have moved or are transitioning from traditional subject librarian roles.