The authors were asked to design and develop a large-scale, web-based learning environment that would effectively assist international aid workers in conducting their daily tasks in the field, at home and in the office in a safer and more secure fashion. The design, development and dissemination of the training needed to be done quickly, inclusively and on a broad scale. This article describes related analysis, design and development, and in doing so illustrates the adoption and use of a unique, blended design approach. (Contains 2 figures.)