Both the ecological and social system are systematically degrading, resulting in decreasing capacities to support human civilization. Product development and manufacturing companies play a key role in driving society’s transition towards a sustainable path. Besides moral arguments, the motivation for companies can be expressed as a matter of smart risk management, i.e. avoiding threats and exploiting opportunities. Such sustainability risks can be related to, for example, brand and reputation, legislative change, or attracting top-talented employees. But, more importantly, it is about understanding changes that are inevitable on markets to come. Based on Maxwell’s interactive qualitative research approach and following the structure of the Design Research Methodology, this thesis aims to contribute (i) to knowledge by increasing the conceptual understanding of what sustainability risks are; and (ii) to practice by researching decision-support for how sustainability risks can be managed in a product development company context. The first study reviewed existing literature and identified characteristics of sustainability risks, which make them particularly difficult to manage. A following exploratory and descriptive study investigated companies’ current risk management practices and preconditions for sustainability integration. It showed that the effects of uncertainty from the sustainability transition need to be identified, assessed, and managed in relation to how they can affect objectives anchored in both internal and external stakeholder value creation. In parallel, the Framework for Strategic Sustainable Development was applied as a lens to understand the implications of the sustainability transition for company risk management. This resulted in a new definition, stating that sustainability risks are threats and opportunities that are due to an organization’s contribution or counteraction to society’s transition towards strategic sustainable development. A questionnaire study then investigated some case companies’ challenges and preconditions to build sustainability capabilities. Finally, a workshop method is proposed that aims to support design teams in early sustainable product development. Future research will leverage on the findings to develop and test decision support for how product development companies can manage sustainability risks on different organizational levels in practice to increase competitiveness, while taking leadership in the transition towards a sustainable society.