Architects Keywords: Advanced Search Directory View All Listings Cornerstone Architectural Group LLC Cornerstone Architectural Group LLC Architects Full service architectural firm, specializing in Commercial, Civic, Industrial & Interior Architecture. Robert M. Longo AIA, LEED AP, Partner NJ Lic. No. 4305 http://www.CornerstoneAG.com Phone 908.753.7004 Fax 908.753.0202 Address 202 Hamilton Boulevard South Plainfield, NJ 07080