About

Since our inception in 1981, O’Donnell & Naccarato has transformed from a 3-person structural engineering firm into a national presence with over 100 dedicated professionals operating from 10 strategically located offices. This journey reflects our unwavering commitment to our core values of communication, quality, innovation, growth, and collaboration.

O&N is a trusted partner for structural solutions across all sectors of the construction industry. With a diverse portfolio of projects spanning every corner of the United States, we offer local expertise with a national reach.

Our depth of experience and limitless creativity are the cornerstones of our approach. Whether crafting innovative designs for new structures or breathing new life into existing ones through expansion, renovation, or restoration, our aim is singular—to help property owners realize the highest and best use of their assets.

As an employee-owned structural engineering firm, nearly all our staff are members of the ESOP, reflecting our deep ownership mindset. This pride in ownership permeates through every aspect of our work and is evident in the care we dedicate to our projects.