The verb "ply" means to practice or perform diligently and is typically used in the context to ply a trade. PLY Architecture has been operating between academia and the profession since 1999, attempting to leverage the best of each against the other. The lecture will introduce the intellectual desires that drive the research based design practice. Recent work will be discussed based on its ability to respond to ambitions of the practice and to build on the experiences of prior investigations. Various themes of technology, sustainability, and craft will be used to position and relate the work.