In this episode of the Build Different podcast, hosts Sam and David Weiss welcome systems engineer Nathan Hoffer from Northrop Grumman to dive into the fascinating world of rocket science. Nathan shares insights from his seven-plus years working on solid rocket motors, explaining the differences between solid, liquid, and hybrid rocket propulsion systems. The conversation covers cutting-edge innovations like Smart Demo's washable mandrels, Stoke Space's revolutionary approach to heat shields, and the challenges of model-based systems engineering. From the technical aspects of rocket fuel casting to career advice for aspiring engineers, this episode offers a behind-the-scenes look at modern aerospace development and the exciting second golden age of rocketry.