A partitioned multi-physics framework is presented that is specifically designed to solve complex sloshing flows within wing-like structures. It is designed around the structural solver /textitMSC Nastran and couples this to multiple fluid solvers in a partitioned way. This allows for a choice in fluid dynamics methodology when considering sloshing problems. While commercial multi-physics frameworks do exist, most offer limited capability in terms of capturing complex and high-fidelity 3D sloshing fluid dynamics, this framework represents an approach to couple multiple industrially relevant closed-source solvers together using a high-performance and open-source code coupling library as the connective layer. A practical overview of the design, both algorithmically and in software terms, is presented, followed by a number of high-level examples of the FSI modelling capability that the framework enables