O'Donnell and Naccarato
| Company type | Private |
|---|---|
| Industry | Structural engineering |
| Founded | 1954 |
| Founder | Seymour Greenberg |
| Headquarters | Philadelphia , United States |
Area served | United States (Philadelphia, New York City, New Jersey, Florida, Indiana) |
Key people | Anthony Naccarato (President) |
Number of employees | 35+ (combined with acquisitions) |
O'Donnell and Naccarato (commonly abbreviated as O&N) is a structural engineering company based in Philadelphia, Pennsylvania, with additional branches located in New York City, New Jersey, Florida, and Indiana.
History
The firm was originally established in 1954 under the name Seymour Greenberg, named after its founder and lead engineer Seymour Greenberg. Its first office was situated within the Philadelphia Bourse building. In 1974, following the addition of principal engineers William O’Donnell and Peter Naccarato, the company was rebranded as Greenberg, O'Donnell and Naccarato. The current name, O'Donnell and Naccarato, was adopted in 1981.
William O'Donnell III, a native of Philadelphia and a civil engineering graduate from Villanova University (class of 1965), served as a sergeant in the U.S. Army Corps of Engineers during the Vietnam War period. He passed away in 2019. Since then, Anthony Naccarato, also a Villanova alumnus (class of 1988), has been the sole President of the firm.
Engineering developments
- In 1962, Seymour Greenberg introduced exposed steel structural components in interior design, significantly influencing industrial style aesthetics.
- Collaborating with Villanova University in 2007, O'Donnell and Naccarato engineered self-compacting concrete beams aimed at minimizing prestress loss and camber effects.
- The firm pioneered the use of "mini piles" at Princeton University Medical Center in 2010; these reduced live load impacts and overturning moments compared to traditional full-length piles.
- Joining ASCE's Structural Engineers 2050 Program in 2021, they committed to eliminating embodied carbon in concrete to contribute to global CO2 emission reductions.
- Also in 2021, they developed advanced blast mitigation solutions for the Frank J. Guarini Justice Complex by incorporating large steel V-shaped trusses combined with thick concrete pads to enhance blast resistance.
- In 2023, O'Donnell and Naccarato designed a fully steel-framed structure for the Children's Hospital of the King's Daughter, utilizing wide-flange brace elements to support future expansions and adaptability.
Offices
- Philadelphia: Serving as O&N's headquarters since the 1981 rebranding from Greenberg, O'Donnell and Naccarato, this original office specializes in high-rise and super-tall building projects.
- Mountainside: Established in 2013 to cater to North Jersey and New York City markets, this branch focuses on parking garage design and assisted living facility projects.
- New York City: Opened in 2015 to extend services into New York State, this office primarily handles facade restoration while supporting other regional offices.
- Indianapolis: Acquired through McComas Engineering's purchase in 2019 (a firm founded in 1991), this location manages projects across the Midwest and continues McComas' legacy under the name McComas/O’Donnell & Naccarato.
- Miami: Added to O&N's Florida operations via acquisition of Douglas Wood Associates, Inc. (established 1992) in 2022; it concentrates on restoration and renovation work under the banner Wood/O’Donnell & Naccarato.
- Orlando: Founded in 2022 during Florida expansion efforts, this office specializes in hospital design along with facade and parking garage restoration projects.
Douglas Wood and Associates
Established in 1992 by Douglas Wood, Douglas Wood & Associates focused on structural engineering projects involving historic buildings, sculptures, as well as the medical and hospitality industries. The firm became well-known for its pioneering use of 3D design in the creation of the Doral Park Pavilion located in Florida. To leverage Miami's surge in construction activity, O’Donnell & Naccarato acquired Douglas Wood, aiming to enhance its foothold in hospital projects and facade restoration. At the time of the acquisition, Douglas Wood & Associates had a workforce of 23 employees.
McComas
Founded by Rodney McComas in 1991, McComas Engineering was based in Carmel, Indiana, serving clients across Ohio, Kentucky, Tennessee, and the metropolitan areas of Chicago and St. Louis. In 2019, O’Donnell & Naccarato expanded its geographic reach beyond Pennsylvania, New Jersey, and New York by acquiring McComas. The firm had a staff of 12 during this transition. Rodney McComas also held the role of president for Indiana’s Structural Engineers Association.
Construction Management
O'Donnell & Naccarato maintains a construction management division that partners with property owners and local governments to ensure projects stay on schedule while minimizing expenses related to contractors and architects. A significant project under their management was the $1.7 million Fire Academy in Plymouth Township, for which Montgomery County provided $171,000 to support timely completion.