Hybrid EbA solutions like green-gray infrastructure, hold incredible promise as a climate adaptation solution, but accepted norms and engineering standards are a key barrier limiting applications. How can we provide information about nature-based solutions performance in the absence of standards? One pathway forward is to collaborate across disciplines and geographies to create 21st century engineering guidelines and data sharing mechanisms for our 21st century challenges. The session speakers will share firsthand experiences with these challenges and discuss potential solutions to addressing the problem in a joint discussion round with all participants.