VerticalGeo started out as an ESRI shop. We have been very faithful to the ESRI brand of GIS. Over the last few years the Open Source GIS community and software has taken some great steps forward. VerticalGeo is committed to using open source data and software whenever possible. We are experts in both the ESRI suite of GIS tools and the Open Source suite of GIS Tools. We are a Sliver Level member of the ESRI Business Partner Network, a charter member of the ESRI Federal Small Business Specialty, and we are very active in the Open Source GIS software community. We provide set-up, customization, and training in both realms.