The National Science Foundation (NSF) is soliciting proposals for managing the operation and maintenance of the National Geophysical Facility (hereafter referred to as NGF) an NSF-funded major facility. The NGF is designed to enable the research community to ask, and address, questions about a variety of Earth processes from local to global scales. NGF will operate global and regional networks of sensors; provide a lending library of instrumentation and support services to enable PI-led field experiments; support archiving, quality control, and delivery of geophysical data and data product development; and provide education, outreach, workforce development, and community engagement activities that serve a wide range of audiences. NGF will be a single facility, with a single operator that will succeed NSFs current geophysical facilities, the Seismological Facility for the Advancement of GEoscience (SAGE) and the Geodetic Facility for the Advancement of GEoscience (GAGE). The award recipient will work closely with NSF and the scientific community to ensure that NGF capabilities support, and advance, Earth Sciences and related disciplines. In cooperation with NSF, and within available resources, the recipient will plan and execute a viable, coherent, and inclusive program to: (1) streamline the management and operations of existing geophysical facility capabilities into one consolidated geophysical facility; (2) enhance existing facility capabilities in instrumentation, data services and cyberinfrastructure; and (3) implement a bold vision to broaden participation and foster a culture of equity and inclusion in the Earth Sciences and related disciplines. The NSF Division of Earth Sciences (EAR) in the Directorate for Geosciences (GEO) has primary responsibility for the programmatic oversight of NGF and activities will be coordinated with the Division of Ocean Sciences (OCE), Division of Atmospheric and Geospace Sciences (AGS), and Office of Polar Programs (OPP). A single award will be made as a cooperative agreement with a duration of five years. NSF may renew the award for an additional five years, subject to availability of funds, the recipient's satisfactory performance, and review of a cost proposal for the second 5-year period. NSFs decision will be informed by the National Science Board Statement on Recompetition of Major Facilities (NSB 2015-45 or its successor).