Tom Conry has been the manager of Fairfax County’s GIS and Mapping Branch since 1999. Over that period, the Branch has progressively leveraged the dramatic developments in spatial technology and in enterprise systems to deliver GIS data and services to more than 13,000 county staff and to public web users. GIS is a core service in the county and is used in numerous county systems, including CAD/911, tax administration and public works. The Branch has implemented a web 3-D application and is implementing new web services to further enterprise use of GIS. The GIS office today maintains and serves over 9 TB of data on the 406 sq. miles of the county.