Donald Friedman is an Adjunct Associate Professor in the Historic Preservation program at Columbia GSAPP and president of Old Structures Engineering, PC, a structural engineering consulting firm for historic and old buildings, working for owners, preservation consultants, architects, contractors, and other engineers. A professional engineer with over 25 years experience in the investigation, analysis, and restoration of landmark buildings, Mr. Friedman holds a B.S. in Civil Engineering from Rensselaer Polytechnic Institute, an M.A. in Historical Studies from the New School for Social Research, is a licensed engineer and is certified in the practice of structural engineering by the Structural Engineering Certification Board (SECB).
In addition to Mr. Friedman’s project work, he has spoken at numerous conferences on such topics as the structural analysis of masonry facades, and the failure of obsolete structural forms; he is the author of After 9-11: An Engineer’s Work at the World Trade Center, Historical Building Construction, and The Investigation of Buildings, and the co-author of Building the Empire State and The Design of Renovations. Refereed papers include “Methodology of Conservation Engineering,” “Cast-Iron Columns in Renovation Design,” “Hidden Intricacies: The Development of Modern Building Skeletons,” and “Ambiguity in Building Investigation.”