The shipbuilding industry faces a pressing challenge: reducing CO2 emissions while navigating a landscape dominated by outdated, carbon-intensive technologies. Traditionally, ships are built to last 25 years without considering future fuel alternatives, which exacerbates the climate crisis. We are currently collaborating with Zero Carbon Shipping on the "Modularity in Ship Design" project, aimed at significantly lowering CO2 emissions in maritime transport. Our focus is on exploring how modular design can transform shipbuilding by allowing vessels to adapt to various fuel options throughout their operational life, thus drastically reducing their carbon footprint. Our role involves facilitating the co-creation process with industry and academic stakeholders. We guide them through ideation workshops and stakeholder mapping sessions, using design thinking to develop and test innovative, user-centric solutions. This approach ensures that both immediate challenges and long-term goals are addressed effectively. In addition to tackling environmental impacts, the project also addresses economic pressures in the shipbuilding industry, such as rising investment costs and competition from global players like China. By raising awareness of modular design, defining a clear implementation framework, and preparing partners to become early adopters, we aim to support sustainable shipbuilding practices that balance ecological and economic considerations. Through structured collaboration and a deep understanding of the problem, we are pioneering a path toward more sustainable and economically viable shipbuilding solutions.