Stanford Solar Car Project
I was one of the original members of the Stanford Solar Car Project, an organization that builds and races cars powered exclusively by sunlight. I was involved with the project in both my undergrad and grad years at Stanford (that's a bit long ago, but I include this work because it was so formative, and so fun).
Not surprisingly, I took on many roles over the years, the largest being the development of a software package to simulate car operation that was used in both the design and racing phases. I also took on management and fundraising roles and participated in races and rallies all over the US and the world.