Reshaping the Built Environment requires those of us who create the built environment to change what we do and how we do it. This re-learning process requires us to engage with society, education, entrepreneurship and practice, welcoming the feedback loops that continually show us lessons learned. Designers are trained to be practical problem solvers, but designers also need to be systems thinkers, combining their analytical skills with a broad understanding of how it all fits together in society and the built environment. The built environment is complex and so is sustainability. Our team is proposing a hierarchy of needs approach to help establish levels of understanding and skills to build on top of each other to make sense of the complexities of sustainability. To move up in the hierarchy of needs, the previous sustainability need must be met. This new model represents a taxonomy of sustainable practice, and allows all of us to understand both where we are and what might be possible. At the base of the pyramid are the foundational needs. Understanding the definition of sustainability, its complexities, and how the principle manifests itself in different applications. An important part of the base level is understanding why engineers have a global responsibility to incorporate sustainability in everything we do. Without this purpose and need, engineers can find themselves asking why are we doing this in the first place? Why is it important to me? The next sustainability level is assessing vulnerabilities and uncertainties, to establish security and safety. Once the two foundational sustainability needs are met, the next step is forming community and belonging- understanding that we cannot improve sustainability alone. Efficiency, impact, and legacy can come next, and these sustainability hierarchy of needs will be further explored in the next stage of this design challenge. Bruna Paranhos Matt Friesen Alan Brown Holly Hall Sarthak Tiwari