The Spallation Neutron Source (SNS) has recognized the need for developing in-house capability to ensure long term sustainability of the superconducting linac (SCL). SNS has made substantial gains in the last 6 years in understanding SCL operation, including system and equipment limiting factors, and resolution of system and equipment issues. Significant effort and focus is required to assure on-going success in the operation, maintenance, and improvement of the SCL and to address the requirements of the upgrade project for the Second Target Station. These interdependent efforts include implementation of demonstrated improvements, fabrication of spare cryomodules, cavity R&D to enhance machine performance, and related SRF facility developments. Cryomodule and vertical cavity testing facilities are being developed to demonstrate process capabilities and to further understand the collective limitations of installed cavities. The status and future plans for SRF facilities at SNS will be presented.