Led UX design for FEMA GO platform modernization after inheriting USWDS design system from departing digital team. Implemented atomic design methodology to establish scalable component hierarchy from basic elements through complex emergency management interfaces. Navigated multi-contractor environment with competing design standards, establishing design system governance through systematic component documentation. Conducted bi-weekly usability testing cycles with emergency management professionals and users, prioritizing features based on user feedback and product owner approval while maintaining atomic design principles for consistency.