L Less heralded than innovation or the creation of new technologies is the maintenance of technological systems: the sometimes unsexy but always vital work of keeping these systems running over time. Maintainers update older systems to be interoperable with newer ones, find and fix bugs, develop and install patches to ensure security and stability, and scan the horizon for new threats to the continued operation of the system. This grant provides three years of funding to The Maintainers, a network of scholars and practitioners devoted to providing support to those involved in the maintenance of critical technological and social systems.  Founded in 2015 and directed by Andrew Russell (SUNY Polytechnical Institute), Jessica Meyerson (Educopia Institute) and Lee Vinsel (Virginia Tech), the Maintainers holds conferences and workshops, connects practitioners and researchers, develops and disseminates best practices, and advocates for the essential social role played by maintainers and their work.  Grant funds will be used over the three year grant period for a number of activities to help build and strengthen the maintainer community, including numerous virtual and in-person events, the creation of two new discipline-specific maintenance subcommunities, the development of new tools and infrastructure for use by the community, and the creation of a strategic plan focused on long-term sustainability.