Insights

Expansion signals Growing geographic footprint with new offices in Durham, UK and an expanded Miami presence suggests opportunity to cross-sell multidisciplinary structural services to international and offshore development projects, as well as to clients seeking global delivery.

Leadership growth Recent promotions and senior hires, including a new principal and senior associate in strategic markets, indicate a transition to broader client leadership and project management capabilities, presenting openings for senior-level relationship development and large-scale project partnerships.

Public awards Industry recognition such as Preservation Achievement Award exposure and CEO award signals credibility with clients in historic preservation, retrofit, and high-profile campus projects—potential entry points for façade restoration, seismic upgrades, and heritage building programs.

Defense against competition Operating as a mid-sized national firm with a diverse project scope positions O&N to compete for mid-market to large-scale projects against regional and national players; identify clients seeking local-to-national coverage and design-build collaboration opportunities.

Project scale Revenue in the $50–100 million range and a growing employee base (51–200) imply capacity for significant structural design work; target clients with multi-building portfolios or capital expenditure programs requiring repeat engineering engagements and ongoing maintenance solutions.

O'Donnell & Naccarato Tech Stack

O'Donnell & Naccarato uses 8 technology products and services including MySQL, Vue.js, JSON-LD, and more. Explore O'Donnell & Naccarato's tech stack below.

  • MySQL
    Database
  • Vue.js
    Javascript Frameworks
  • JSON-LD
    Javascript Frameworks
  • jQuery Migrate
    Javascript Libraries
  • FancyBox
    Javascript Libraries
  • Priority Hints
    Performance
  • HTTP/3
    Web & Portal Technology
  • Gravity Forms
    Web Platform Extensions

Media & News

O'Donnell & Naccarato's Email Address Formats

O'Donnell & Naccarato uses at least 1 format(s):
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.

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 July 2026, O'Donnell & Naccarato has approximately 111 employees across 1 continents, including North America. Key team members include President: D. S.President: N.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 MySQLVue.jsJSON-LDjQuery MigrateFancyBoxPriority HintsHTTP/3Gravity Forms.

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

Section iconFunding & Financials

  • $50M$100M

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

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