Insights

Growth expansion O'Donnell & Naccarato is expanding its footprint with new North Carolina office and Miami leadership, signaling active geographic growth and cross-market opportunities for structural engineering services beyond their current regional base.

Strategic partnerships Recent collaboration with TLC Engineering Solutions and involvement from multiple project partners indicate a readiness to engage in large, multi-firm delivery teams, presenting a pathway to offer integrated structural and consulting services for complex campuses and healthcare projects.

Healthcare milestone High-profile healthcare campus expansion in Geisinger system valued at the $900M level creates a reference for scale-driven engagements and opportunities to position O&N for similar large-scale hospital and medical campus projects.

Leadership growth Promotions to principal and senior associate roles, plus new senior leadership for the Miami office, suggest a scalable leadership model and an opening for targeted executive-level outreach to pursue major project bids in new and existing markets.

Revenue and capacity With a revenue range of 50 to 100 million and a headcount of 51-200, O&N sits in a growth-ready band ideal for value-added services, retainer-style engagements, and strategic account expansion with mid-to-large market clients seeking reliable structural engineering partners.

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O'Donnell & Naccarato Tech Stack

O'Donnell & Naccarato uses 8 technology products and services including WordPress, MySQL, Shopify, and more. Explore O'Donnell & Naccarato's tech stack below.

Media & News

O'Donnell & Naccarato's Email Address Formats

O'Donnell & Naccarato uses at least 4 email formats:
O'Donnell & Naccarato Email FormatsExamplePercentage
FLast@o-n.comJDoe@o-n.com
91%
Last@o-n.comDoe@o-n.com
4%
First.Last@o-n.comJohn.Doe@o-n.com
3%
First@o-n.comJohn@o-n.com
2%

Frequently Asked Questions

What is O'Donnell & Naccarato's phone number?

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You can contact O'Donnell & Naccarato's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is O'Donnell & Naccarato's official website and social media links?

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O'Donnell & Naccarato's official website is o-n.com and has social profiles on LinkedIn.

How much revenue does O'Donnell & Naccarato generate?

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As of August 2026, O'Donnell & Naccarato's annual revenue is estimated to be $50M - $100M.

What is O'Donnell & Naccarato's NAICS code?

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O'Donnell & Naccarato's NAICS code is 5413 - Architectural, Engineering, and Related Services.

How many employees does O'Donnell & Naccarato have currently?

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As of August 2026, O'Donnell & Naccarato has approximately 112 employees across 2 continents, including North America and South America. Key team members include President: D. S., President: N. and President Emeritus - Principal: N. C. Explore O'Donnell & Naccarato's employee directory with LeadIQ.

What industry does O'Donnell & Naccarato belong to?

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O'Donnell & Naccarato operates in the Engineering Services industry.

What technology does O'Donnell & Naccarato use?

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O'Donnell & Naccarato's tech stack includes WordPress, MySQL, Shopify, Microsoft 365, SendGrid, Google Cloud, jQuery Migrate and HTTP/3.

What is O'Donnell & Naccarato's email format?

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O'Donnell & Naccarato's email format typically follows the pattern of FLast@o-n.com. Find more O'Donnell & Naccarato email formats with LeadIQ.

When was O'Donnell & Naccarato founded?

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O'Donnell & Naccarato was founded in 1981.
O'Donnell & Naccarato logo

O'Donnell & Naccarato

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.

Section iconCompany Overview

Phone number
Website
o-n.com
NAICS Code
5413 - Architectural, Engineering, and Related Services
Founded
1981
Employees
51-200

Section iconFunding & Financials

  • $50M - $100M

    O'Donnell & Naccarato's revenue is estimated to be in the range of $50M - $100M

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