GIS has evolved to become more and more an integral part of the enterprise operations in any business. Service Oriented Architecture (SOA) is becoming a popular choice as deployment architecture. Various departments within an organization typically use or try to use the SOA to access services, data and applications to conduct their business. GIS and other services are being deployed and consumed to address business goals and routine operations. Moreover, there are legacy data support techniques, and data dissemination processes that makes an enterprise implementation seamless and sensible. Weston has been involved as a “Trusted Integrator” on many such enterprise GIS integration projects and would like to discuss some related case studies. Some challenges always present themselves during any enterprise implementation. But there are some key traits and steps for a successful enterprise implementation. Weston would like to cover those as well during the presentation.