Design Cutting Edge Stratospheric Balloon Systems Use and expansion of the in-house design tool, create mathematical models or other tools to evaluate potential balloon performance This will include creating and updating material models (over temperature and pressure gradients) based on in-house and in field test data . In this role, you will need to understand material properties such as density, thickness, creep, tensile, elongation, tear, puncture, DSC, melt index, low temp brittleness, UV resistance, stress crack etc. and how to apply them to platform design.