A deeper understanding of high temperature electrolysis (HTE) electrode microstructure evolution as a function of local solid-oxide composition and operating conditions is needed to develop more active, longer-life electrodes. A supernode that advances and orchestrates four HydroGEN node capabilities to provide a unique capability to characterize and predict microstructure evolution of solid oxide electrode materials as a function of electrode materials selection, synthesis methods, and operating conditions and identify the degradation mechanisms. More importantly, the mitigation solutions will be proposed and validated through the Supernode effort. The HTE supernode will support fundamental research and cell development being conducted by HydroGEN projects and commercial developers of HTE stacks. The goal is to help HTE cell developers achieve higher performance and lower degradation rates to reduce the costs of hydrogen production by HTE. In this work, we present the progress on how five national laboratories and one university work together and move forward on the HTE Supernode.