Principals & Associates

Our Principals and Associates include Historic Preservation Specialists, Architectural and Industrial Historians, Architectural Photographers, Professional Engineers, Historical Architects.

Richard M. Casella. President, Principal Architectural & Engineering Historian. Mr. Casella has a MS degree in Historic Preservation and 30-plus years of experience in the field. As a private consultant and employee of several prominent engineering, architectural, and cultural resource consulting firms, he has completed more than 200 historic property projects in 24 states. With additional education and training in science and technology, he specializes in engineering, industrial and maritime historic resources.

Rob Tucher Photographic Documentation.
Associate, Principal Photographer.
A professional photographer since 1979, Mr. Tucher specializes in large-format archival photography of historic buildings and structures. His work includes many of America's most important resources including the White House, USS Nautilus, Big Inch Pipeline, and dozens of major factories, military bases and bridges. In addition to degrees in Communications and Historic Preservation, he has worked and studied under major figures in his field including Ansel Adams and George Tice. Visit;

Philip E. Pendleton. Associate, Senior Historian & Architectural Historian. Mr. Pendleton extends HDC's capabilities with specialized research & writing expertise in the areas of battlefields & military history, rural landscapes, vernacular architecture, early communities and milling industries. His book Oley Valley Heritage: The Colonial Years 1700-1775 (1995), won the Best Local History Book award from both the Pennsylvania Federation of Museums and Historical Organizations and the American Association for State and Local History. His HABS documentation of Clifton Farm at Monocacy National Battlefield [MD] is an instructive example in the HABS Historian's Guidelines. He has a MA in History, post-graduate studies in historic preservation and architectural history, and extensive public & private project experience. As former vice-chair of the Oley [PA] Historic Architectural Review Board, he is experienced with the guidelines and review process of regulated local historic districts.

Craig S. Adams.  Associate, Principal Architectural Historian. Mr. Adams has a MS in Historic Preservation and 30-plus years experience in Historic Preservation projects, primarily in the areas of adaptive reuse, restoration, maritime resources and preservation marketing and development. His work has included major waterfront developments in Vermont and New York, including New York Docks Department Pier A, the 1884 engineering landmark at the tip of Manhattan.

Rosin Preservation, LLC. Associated Firm. Rosin Preservation provides comprehensive services in the areas of historic preservation planning and cultural resource management to individual, civic, corporate, and government clients. Under the direction of company founder Elizabeth Rosin, the firm assists clients in preserving historic properties, in complying with cultural resource regulations, and in capitalizing on the economic benefits of historic preservation. Ms. Rosin has a MS in Historic Preservation and 17 years experience in the field. See

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