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O'Donnell and Naccarato

Formerly	Seymour Greenberg (1954–1974) Greenberg, O'Donnell and Naccarato (1974–1981)
Company type	Structural Engineering
Industry	Civil engineering
Founded	1954; 70 years ago (1954) in Philadelphia, United States
Founder	Seymour Greenberg
Number of locations	6 (2023)
Area served	Northeast United States
Key people	William O’Donnell Peter Naccarato
Revenue	$63.7M (2022)
Owner	Peter Naccarato
Number of employees	129 (2022)
Website	www.o-n.com

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.

History

The firm was founded in 1954 as Seymour Greenberg, named after the founder and original principle engineer, Seymour Greenberg, and operated out of the Philadelphia Bourse building. The firm hired two more principle engineers, William O’Donnell and Peter Naccarato and the name of the firm was changed in 1974 to Greenberg, O'Donnell and Naccarato, however, by 1981 the firm was renamed O'Donnell and Naccarato. William O'Donnell III was a Philadelphia native, born on January 14, 1944. After graduating from the Cardinal Dougherty High School in 1961, O'Donnell earned an undergraduate degree in civil engineering from Villanova in 1965. O'Donnell served in the U.S. Army as a Sergeant and engineer during the Vietnam War, however, never saw combat and spent the entire war in Korea. O'Donnell died on December 15, 2019. Anthony Naccarato is a graduate of Villanova's class of 1988 and since the passing of William O'Donnell has been the sole President of the company.

Engineering developments

• In 1962 Seymour Greenberg pioneered the use of exposed steel structural elements within an interior space to comport with the overall aesthetic of a property resulting in a fundamental change to interior design and Industrial style interiors.
• In 2007 O'Donnell and Naccarato developed a series of self-compacting concrete beams in association with Villanova University to mitigate pre-stress loss and camber in beams.
• In 2010 O'Donnell and Naccarato developed "mini piles" during their designing of The University Medical Center at Princeton to help reduce the live load and the overturning force associated with full length piles.
• In 2021 O'Donnell and Naccarato joined the ASCE's Structural Engineers 2050 Program, working to develop ways to wholly eliminate the use of embodied carbon within concrete to dramatically reduce global CO₂ emissions.
• In 2021 O'Donnell and Naccarato revolutionized blast protection during the design of the Frank J. Guarini Justice Complex. Following the Oklahoma City bombing, the United States Federal government has been pursuing new and novel solutions to blast protection within federal buildings. The Frank J. Guarini Justice Complex uses a series of massive V-shaped trusses made from steel ranging from W14x233 up to W14x730 to form asymmetrical cantilevers. Combined with four elevator cores and a six-foot thick concrete pad on the ground level, the Frank J. Guarini Justice Complex could take a previously catastrophic ground level blast and suffer little overall structural damage.
• In 2023 O'Donnell and Naccarato developed the Children's Hospital of the King's Daughter, during which, the firm committed to a fully steel skeleton innovating wide-flange brace elements to ensure future flexibility, leaving the hospital with room to expand as its programs and technologies change.

Offices

• Philadelphia: O&N's original and oldest office, the firm moved into the office in 1981 during the rebranding process from Greenberg, O'Donnell and Naccarato. Serving as the headquarters for the entire firm, working primarily on the firm's tall and super-tall building projects.
• Mountainside: O&N's second office, established in 2013 to better service the firm's projects in North Jersey and New York City, the office primarily designs new parking garages, as well as several assisted living facilities.
• New York City: Established following an expansion into projects in New York State, the New York City office was founded in 2015 and focuses on facade restoration, as well as auxiliary services for the firm's other offices.

• Indianapolis: Established in 1991 as the headquarters of the McComas Engineering firm, in 2019 the firm was bought by O&N to become their Indianapolis office. The office works on the firm's Midwest projects and continues McComas' design and restoration services. The office retains the McComas name and is officially McComas/O’Donnell & Naccarato
• Miami: Established in 1992 as the headquarters of Douglas Wood Associates, Inc, the firm was purchased by O&N in 2022 to expand the firm's presence into Florida. The office continues Douglas Wood's reputation for restoration and renovation work, primarily working on existing buildings. The office retains the Wood name and is officially Wood/O’Donnell & Naccarato
• Orlando: Established in 2022, the O&N Orlando office was established following the firm's expansion into Florida. The firm specializes in the design of hospitals as well as facade and parking garage restorations.

Mergers and acquisitions

Douglas Wood and Associates

Douglas Wood & Associates was founded by its eponymous Douglas Wood in 1992 specializing in historical buildings, sculptures, medical, and hospitality buildings. The firm received praise for its structural design of the award-winning Doral Park Pavilion in Doral, Florida, a 25 by 50-foot concrete pavilion designed to look like natural boulders that was entirely designed in 3D modeling. Seeking to expand into the Florida market, especially due to the building boom in Miami, O’Donnell & Naccarato acquired Douglas Wood due to their established reputation as a structural engineering firm, specifically in the fields that O’Donnell & Naccarato already work on, namely hospitals and facade restoration. At the time of the merger, DW&A had 23 employees.

McComas

Founded by Rodney McComas in 1991 and based out of Carmel, Indiana, McComas engineering serviced Ohio, Kentucky, and Tennessee as well as the Chicago and St. Louis metro areas. At the time of the merger in 2019, McComas had 12 employees, and O’Donnell & Naccarato had begun to seek expansion beyond Pennsylvania, New Jersey and New York. Rodney McComas was also the president of the Indiana branch of the Structural Engineers Association.

Construction Management

O'Donnell and Naccarato also maintains a construction management wing that works with property owners and municipal government to keep projects on schedule and to cut out waste spending by contractors and architects. O'Donnell and Naccarato managed the construction of a $1.7 million Fire academy in Plymouth Township, being paid $171,000 by Montgomery County to ensure the project remained on schedule.

References

1. ^ "THE BATTLE OF INNER SPACE: • STEEL WINS" (PDF). Modern Steel Construction. II (4). American Institute of Steel Construction: 16. October 1962. Retrieved 1 November 2023.
2. "We Are Creative Structural Engineers". o-n.com. Retrieved 1 November 2023.
3. "William O'Donnell III". Legacy.com. The Times Herald. Retrieved 1 November 2023.
4. "Class Notes". Villanova University. Retrieved 1 November 2023.
5. Gross, Shawn P.; Yost, Joseph R.; Gaynor, Elizabeth. "Experimental Study of Prestress Loss and Camber in High-Strength SCC Beams" (PDF). American Concrete Institute. Retrieved 2 November 2023.
6. Perkins, Stephen; Hanagan, Linda. "Final Report" (PDF). Penn State College of Engineering. Retrieved 2 November 2023.
7. Perkins, Stephen; Hanagan, Linda. "Technical Report III" (PDF). Penn State College of Engineering. Retrieved 2 November 2023.
8. "Structural Engineering Firm O'Donnell & Naccarato Joins Structural Engineers 2050 Program". 1888pressrelease.com. ASCE. Retrieved 2 November 2023.
9. Reid, Robert L. "Trusses help protect court complex from blast-induced progressive collapse". Civil Engineering Source. ASCE. Retrieved 2 November 2023.
10. HERRMANN, MICHAEL. "Teaming Up to Deliver Hope" (PDF). Modern Steel Construction. AISC. Retrieved 2 November 2023.
11. "O'Donnell & Naccarato – Philadelphia Office". o-n.com. 8 September 2023. Retrieved 1 November 2023.
12. "O'Donnell & Naccarato – Mountainside Office". o-n.com. 8 September 2023. Retrieved 1 November 2023.
13. "Structural Engineering firm O'Donnell and Naccarato opens office in Mountainside". NJ.com. 22 July 2013. Retrieved 1 November 2023.
14. "O'Donnell & Naccarato – New York Office". o-n.com. 8 September 2023. Retrieved 1 November 2023.
15. "McComas/O'Donnell & Naccarato – Indianapolis Office". o-n.com. 8 September 2023. Retrieved 1 November 2023.
16. "Wood / O'Donnell & Naccarato – Miami Office". o-n.com. 8 September 2023. Retrieved 1 November 2023.
17. "O'Donnell & Naccarato – Orlando Office". o-n.com. 8 September 2023. Retrieved 1 November 2023.
18. "Our Services". douglaswood.biz. Retrieved 2 November 2023.
19. "Douglas Wood & Associates Inc". constructionjournal.com. Retrieved 2 November 2023.
20. Sicaras, Victoria (5 March 2015). "Sculptural Pavilion Wins Top Honor". concreteconstruction.net. Retrieved 2 November 2023.
21. "O'Donnell & Naccarato Acquires Miami Firm Douglas Wood Associates, Opens Orlando Office". o-n.com. 19 October 2022. Retrieved 2 November 2023.
22. Walker, Tracey (27 October 2022). "O'Donnell & Naccarato Acquires Douglas Wood Associates, Opens New Office". healthcaredesignmagazine.com. Retrieved 2 November 2023.
23. "McComas Engineering Joins O'Donell & Naccarato". Civil + Structural Engineer. Retrieved 2 November 2023.
24. "Executive Summary". constructionjournal.com. Retrieved 2 November 2023.
25. Kostelni, Natalie. "O'Donnell & Naccarato makes buy to expand into Midest". Philadelphia Business Journal. American City Business Journals. Retrieved 2 November 2023.
26. "INDIANA STRUCTURAL ENGINEERS ASSOCIATION". Purdue University. Retrieved 2 November 2023.
27. "MANAGER TO OVERSEE TRAINING CENTER PROJECT * THE COUNTY INTENDS TO KEEP ACADEMY RENOVATION WITHIN BUDGET". The Morning Call. 20 December 1996. Retrieved 1 November 2023.

• American companies established in 1954
• Construction and civil engineering companies established in 1954
• Consulting firms established in 1954
• Design companies established in 1954
• Construction and civil engineering companies of the United States
• Companies based in Philadelphia