This proceedings volume contains a collection of 20 papers from the following symposia held during the 2015 Materials Science and Technology (MS&T '15) meeting: • 7th International Symposium on Green and Sustainable Technologies for Materials Manufacturing Processing • Materials for Nuclear Applications and Extreme Environments • Materials Issues in Nuclear Waste Management in the 21st Century • Nanotechnology for Energy, Healthcare and Industry • Materials for Processes for CO2 Capture, Conversion and Sequestration • Hybrid Organic — Inorganic Materials for Alternative Energy.