At the GS-09 level, the GIS Specialist will provide user support, manage GIS data, offer mobile GIS support, and conduct GIS training while maintaining relationships with internal and external stakeholders. At the GS-11 level, responsibilities expand to include integrating GIS with planning activities, coordinating data analysis, managing project schedules, and overseeing corporate databases. The role also involves researching and training users on new technologies to improve workflow.