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Langan Engineering and Environmental Services, Inc. is a full service, multidiscipline engineering firm located in Elmwood Park, NJ. As authorized developers in Autodesk's Developer Network for over five years, we have developed many powerful custom add-on applications for all versions of AutoCAD, Land Desktop and Civil 3D. Contact email@example.com for more information on custom CAD or GIS solutions, or visit our main web site at www.langan.com.