O'Donnell & Naccarato Email Format

Engineering ServicesPennsylvania, United States51-200 Employees

O'Donnell & Naccarato is a structural engineering practice based in Philadelphia, Pennsylvania. Founded in 1981 as a three-person operation, it has grown into a national firm with ten offices across the United States. The firm delivers structural solutions for buildings across all construction market sectors on projects located nationwide.

Its work spans diverse building types and market segments, reflecting a nationwide reach in the United States. The company is positioned as a national provider of structural engineering services within the industry, emphasizing collaborative design and technical reliability. In 2026 the firm expanded its footprint with the opening of an office in Durham, United Kingdom, signaling geographic growth beyond its domestic market.

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