O’Donnell & Naccarato leverages over 40 years of structural engineering 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 healthcare facilities to industrial buildings, historic restorations, and fit-outs — our engineering experience is diverse in scope and spans every major vertical construction sector. → View Projects
O&N’s predecessor Seymour Greenberg opened in Philadelphia in 1954 later welcoming Principals William O’Donnell and Peter Naccarato. In 1981 the firm adopted its current name and set a foundation for national growth. Today O’Donnell & Naccarato has two offices in the Mid-Atlantic region, two offices in Florida, a Midwest office, and O’Donnell & Naccarato Structural Engineers, our Manhattan based corporate affiliate.
O’Donnell & Naccarato is dedicated to using a progressive design and team oriented approach to provide structural engineering services that contribute to the success of our clients, employees and community.
We seek to realize our mission by providing a supportive, engaging and team-oriented atmosphere for our employees and clients which is rooted in pro-active internal and external communication. We expect to realize a fair return for our efforts and, as an ESOP (Employee Stock Ownership Plan) firm, provide the opportunity for all employees to share in the prosperity of the firm. O’Donnell & Naccarato’s vision is to extend our vast experience and positive reputation in structural engineering to be an industry leader through outstanding: