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Private company

O'Donnell and Naccarato

Logo: O'Donnell and Naccarato, Public domain, via Wikimedia Commons3

American structural engineering firm

O'Donnell and Naccarato (O&N) is a structural engineering firm in Philadelphia, Pennsylvania with offices in New York City, New Jersey, Florida, and Indiana.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

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O'Donnell and Naccarato (O&N) is a structural engineering firm in Philadelphia, Pennsylvania with offices in New York City, New Jersey, Florida, and Indiana.2

Sources

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