David Fixler has guided the restoration and renovation of numerous significant landmark facilities for government and higher education clients around the country.

A frequent writer and lecturer, David has been published in such magazines as Architecture, Architectural Record, Journal of the Society of Architectural Historians, APT Bulletin, Metropolis, Cultural Resources Management, Traditional Buildings, Spazio (Italy) and PTAH (Finland). He has lectured and taught at Columbia University, the University of Pennsylvania, MIT, Wellesley College, Wentworth Institute, and the Boston Architectural Center.

David has also served as a design juror at RISD and MIT, and conceived, helped to organize, and participated in numerous conferences on a wide range of architecture and preservation topics. He is also a co-founder and president of DOCOMOMO-U.S./New England, co-chair of the Association for Preservation Technology International (APTI) Committee on Modern Heritage, and a past Board member of the Society of Architectural Historians.