The Emory Libraries implemented a second-generation preservation infrastructure in 2019 utilizing Hyrax 3, Fedora 4 and AWS, following a requirements gathering phase that included developing a preservation policy and a review of preservation community best practices. This presentation describes our solution design including locally-defined entities such as preservation workflows and events and FileSet expansion to support derivative files. We will also address implementation lessons learned while leveraging existing Samvera functionality and building new features to bridge gaps between existing framework components. The 'Related URL' below links to a video recording of the session. The video has closed captioning. and A presentation given at Samvera Connect 2020 On-line described thus