Robert Sanford has a PhD in environmental science and is Emeritus Professor of Environmental Science & Policy at the University of Southern Maine. He was a Registered Professional Archaeologist in a consulting partnership and has worked in government as an environmental planner. Currently he consults for Global Impact Assessment, Inc. Daniel Martínez has a PhD in chemical engineering and was Associate Research Professor at the University of Southern Maine. He has worked at NASA, at an international energy non-profit, and currently is an independent researcher, technical consultant, and a tabletop game developer.