The development of multifunctional sustainable materials design, modeling and fabrication improves aerospace propulsion and power systems efficiency and reduces weight, cooling requirements, and fuel consumption & emissions (NOx and CO2) and overall power losses. Several technologies are being pursued in support of these developments and will be discussed. This presentation will first give an overview of fabrication approaches, testing and modeling of ceramic matrix composites (CMCs) for next-generation of gas turbine engine thermos-structural hot components operating in extreme environments. Secondly, the design, modeling, and direct write additive manufacturing (DWAM) of lithium iron phosphate LiFePO4 (LFP) 3D electrodes for batteries for electrified aircraft propulsion (EAP) will be presented. Finally, novel processing, testing and characterization of copper/carbon nanotube (Cu/CNT) yarn composite conductor for power and propulsion systems will be discussed.