The US Navy faces increasing demands for energy production and enhanced environmental stewardship. In addition to emissions, the Navy's environmental footprint impacts the communities and personnel around naval air bases, and other areas, such as aircraft carriers and training sites. The exhaust nozzles of high thrust engines, with low bypass ratios and afterburners, used in military combat aircraft create a greater pressure mismatch, accelerating environmental noise generation. IAI and collaborators from Stanford University are developing the Coupled Multi-physics Analysis and Design Optimization (COMANDO) tool that provides a framework to streamline nozzle design, improve efficiency, and reduce noise generation in advanced exhaust systems. Jet and nozzle flow are characterized by a complex combination of turbulent mixing, temperature fluctuation, and compressibility effects, which may be further complicated by chemical reactions and shear layer instabilities. A toolkit combining state-of-the-art nozzle flow modeling techniques and multi-disciplinary optimization is needed to accurately capture the acoustic signatures of engine nozzle configurations. The feasibility of the approach has been demonstrated by developing disciplinary analyses for aerodynamics and structures, coupling them efficiently, and developing a stand-up optimization architecture. In the next phase, the team will further develop these methods and add acoustic and propulsion system analyses.