Have you ever heard of a collection strategist librarian? Is your library considering moving from a traditional subject-based model to a functional model? Or, maybe you're just curious about how libraries can leverage Ex Libris products, particularly Rialto, to better manage our collections. In this session, we will give an outline of our library's functional model and our role as collection strategists, plus some advantages and disadvantages of the model. We will talk about strategies we have developed using Rialto, such as evidence-based acquisitions (EBA), selection plans, firm ordering, and more. We will also discuss challenges we have faced and what we have learned from our mistakes.