For our latest episode, we spoke with Kristy Walson and Sarah Gudeman of BranchPattern. It was a fun moment to catch them, right after Greenbuild, and we talked about their careers and also how partnerships and friends are important in this work. 

Kristy is a mechanical engineer and she is a Principal and Building Science Practice Lead at BranchPattern. Based in Orlando, Florida, Kristy is dedicated to advancing sustainable design and decarbonization and collaborates to deliver building science services that propel the industry. 

Sarah is a Principal and Engineering Practice Lead at BranchPattern; she is based in Omaha, Nebraska. She integrates engineering and building science to create practical, scalable solutions that improve building performance, reduce carbon, and enhance health and comfort.

This was a wide-ranging conversation that included their youth experiences and their thoughts about the power of collaboration, their work at BranchPattern, and the imperatives that the movement and industry are facing in 2025. 

“We have an obligation to do better once we know better,” Sarah says. “As designers and engineers, we have a lot of power to shift the norms -- what is high performance, what is human centered, what is low carbon -- and really help elevate that baseline, instead of treating those things as an upgrade. 

Kristy says she is empowered by the community. “I wouldn't be here doing this work if I didn't have that North Star of feeling like I'm part of a movement,” she says. “Sustainability is, in some ways, a technical craft, but being part of the movement has enabled me to advocate for equity, policy, systemic change, and for breaking and remaking the systems that don't work for all of us.”