Dr. David B. Saint John is a researcher, educator, and technophile currently performing post-doctoral research in additive manufacturing methods at the Penn State Center for Innovative Materials Processing through Direct Digital Deposition (CIMP-3D). He has guided students and faculty in the construction of over 30 open source 3D printers and the repair of many commercial 3D printing systems, and he is currently assisting industry groups in their adoption/application of methods for the additive manufacturing of metal components.