My practice in geoenvironmental engineering fits in four broad categories: (i) design and assessment of environmental containment systems for municipal, mining, radioactive, and hazardous wastes, (ii) sustainability assessment of engineering systems, (ii) recycling/upcycling of waste materials, and (iv) reuse of industrial byproducts for sustainable construction. In each of these areas, we emphasize a full range of study from basic theory to practice and address energy and mass transfer issues. Our research includes fundamental laboratory studies, development of computer models, and practical field demonstration of new technologies. In many cases, our research findings are validated at full-scale at operating facilities or in infrastructure in collaboration with industry and/or government agencies.