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We Are Creative Structural Engineers

operating nationally in support of the entire building lifecycle:

Group of structural engineers of O'Donnell & Naccarato
structural engineers of ODonnell & Naccarato

Est. 1981

O’Donnell & Naccarato leverages over 40 years of structural engineering experience to design new buildings, renovations, retrofits, expansions, and restorations of all types and levels of complexity. As a partner to design professionals and building owners alike, our services are designed to enhance each facility’s value and extend useful life. From new healthcare facilities to industrial buildings, historic restorations, and fit-outs — our engineering experience is diverse in scope and spans every major vertical construction sector. → View Projects

Services

New Buildings

  • Structural Design
  • Condition Assessment
  • Parking / Functional Design
  • Seismic Evaluation
  • Feasibility Study
  • Peer Review

Existing Buildings

  • Adaptive Reuse
  • Additions
  • Vertical Expansion
  • Interior Renovation
  • Facility Assessment
  • Emergency Response

Facades & Garages

  • Philadelphia Facade Inspection Ordinance-Compliant Assessments
  • NYC DOB-Compliant Assessments
  • Condition Assessment
  • Repair / Restoration Design
  • Historic Preservation

Leadership

Officers

Anthony Naccarato, PE, SE, F.ASCE

Chairman & CEO

Dennis Mordan, PE, SE

President

Scott Bauer, PE, SE, LEED AP

Vice President, Chief Engineering Officer

Michael Herrmann, PE, SE

Vice President, Chief Marketing Officer / Chief Administration Officer 

Melissa Pastras-Brugler, MBA, PHR, SHRM-CP

Chief Financial Officer, Chief Human Resources Officer

Paul Panzarino, PE, SE

Vice President

Principals

James Behler, PE, SE

Principal

Alan Miller, PE, SE

Principal

Michael Miller, PE, SE

Principal

Tom Miltner, PE

Principal

Mark Orsini, PE, SE

Principal

Brian Rawlings, PE, SE

Principal

Douglas Wood, PE

Principal

Directors

Robert Franco, PE, SE

Regional Director

Daryl Fennell

Senior Associate, Director of Production

Tuna Yelkikanat, PE, LEED GA

Director of Strategic Partnerships

Holly Taubman

Marketing Director

Brian Starrett, PE

Senior Associate / Regional Director
Bill and Pete, 1988

Foundation

O&N’s predecessor Seymour Greenberg opened in Philadelphia in 1954 later welcoming Principals William O’Donnell and Peter Naccarato. In 1981 the firm adopted its current name and set a foundation for national growth. Today O’Donnell & Naccarato has two offices in the Mid-Atlantic region, two offices in Florida, a Midwest office, and O’Donnell & Naccarato Structural Engineers, our Manhattan based corporate affiliate.

Our Mission

O’Donnell & Naccarato is dedicated to using a progressive design and team oriented approach to provide structural engineering services that contribute to the success of our clients, employees and community.

Our Vision

We seek to realize our mission by providing a supportive, engaging and team-oriented atmosphere for our employees and clients which is rooted in pro-active internal and external communication. We expect to realize a fair return for our efforts and, as an ESOP (Employee Stock Ownership Plan) firm, provide the opportunity for all employees to share in the prosperity of the firm. O’Donnell & Naccarato’s vision is to extend our vast experience and positive reputation in structural engineering to be an industry leader through outstanding:

  • Project Creativity
  • Efficiency
  • Technical Prowess
  • Delivery
  • Client Relationships

Our Values

  • Excellence in Structural Engineering
  • Quality Service
  • Proactive Communication
  • Teamwork
  • Unwavering Integrity
  • Progressive Approach
  • Being and Developing Leaders
  • Retaining and Recruiting High-Quality Personnel