O'Donnell & Naccarato

Est. 1954O’Donnell & Naccarato’s Structural Engineers and Restoration Professionals leverage 65 years of experience to design new buildings, renovations, retrofits, expansions, and restorations of all types and levels of complexity. As a partner to design professionals and building owners alike, our services are designed to enhance each facility’s value and extend useful life. From new replacement hospitals to historic hi-rise restorations and small fit-outs, our engineering experience is diverse in size and scope and spans every major vertical construction sector. O&N’s Philadelphia headquarters office is supported by two Mid-Atlantic branch offices and O’Donnell & Naccarato Structural Engineers, a Manhattan-based corporate affiliate founded by four O&N Principals to serve projects in New York State.