This project addresses an emerging research need – namely the need to develop and transition to a new, advanced, mid-scale platform for CISE research. In particular, the project will update, adapt, operate and maintain the GENI infrastructure in order to support novel at-scale networking research across the CISE community, and to enable planning for a next generation mid-scale research infrastructure to occur. Our ENTeR project will facilitate the transition from GENI to a new platform capable of supporting a much larger portion of the CISE community. The ENTeR team consists of the University of Kentucky, RENCI/UNC Chapel Hill, University of Maryland, University of Utah and Internet2 – all intimately familiar with designing, developing, installing, and operating the various elements of the GENI infrastructure. The team’s primary focus will be to ensure that the critical portions of the GENI infrastructure needed by the majority of the researchers remain available and relevant. Critical components include the InstaGENI and ExoGENI edge clouds, the stitching service components, which allow experimenters to build inter-site topologies, the GENI Clearinghouse, GENI Portal, and the GENI Desktop that provide easy experimenter access to GENI tools, and the GENI Monitoring Service that allows users and operators/providers to collect infrastructure measurement data. The team will also continue to perform various mission-critical functions needed to enable and support new research and experimentation efforts in GENI, like project and account management, infrastructure support for tutorials and other outreach events, and issue tracking and troubleshooting, including dealing with security incidents, and escalation to appropriate responsible parties. The team will participate in planning efforts for a follow-on mid-scale testbed infrastructure, adapting ENTeR project efforts in an attempt to begin moving toward a future infrastructure that may emerge.