top of page

Who we are

Orndorf & Associates, Inc. (O&A) is a structural engineering and design firm with a strong presence in the Philadelphia, PA region and surrounding states. We are an award-winning, client-focused company that seamlessly combines the extensive expertise of a large engineering firm with the personalized service of a small firm.

Kevin Orndorf, our principal, has over 40 years of diverse structural engineering design experience. Our specialized team of engineers has a diverse skillset in the design of steel, concrete, timber, masonry, and cold-formed metal framed structures. We also work with clients to assist with construction means and methods, including site shoring of excavation and underpinning design.

We are currently licensed in 32 states, plus Washington, D.C., and will travel to meet our clients' needs.


Our expertise encompasses a wide range of project types, including new construction, renovations, retrofits, adaptive reuse, and historic rehabilitation. Alongside our design services, we also provide engineering feasibility studies, due-diligence surveys, constructability reviews, and peer review analyses. We have experience working on projects of various sizes, scopes, and complexities, with construction values ranging from one million to one hundred million dollars. Our market sectors include retail and commercial, education, healthcare, government, industrial, religious, hospitality, and housing, including single-family, multi-family, and high-end residential developments.​

  • Structural Surveys

  • Feasibility Studies

  • Design Development

  • Contract Documentation

  • Construction Support

  • Peer Review and Constructability Studies

  • Adaptive Reuse

  • Historic Restorations

  • Renovations

  • New Construction

  • Structural Due Diligence Surveys

  • Design & Documentation of Shoring

  • Design & Documentation of Underpinning

  • Cold Formed Metal Framing Design

  • Shop Drawing Review & Documentation

  • Framing Analysis for Solar Panel Installation

  • Building Facade Inspections Services

  • Means & Methods of Construction Consultation


Above all, we are responsive to our clients' needs and serve them in a professional manner. We strive to building strong relationships and we pride ourselves with our high percentage of repeat business.


On all projects, we stress the importance of design excellence with an emphasis on detailed construction documentation. This results in fewer change orders during construction. We work to exceed technical, financial and scheduling goals on all project deliverables.


Each project is completed in a timely manner, within its written scope of services, and within its budget. Our dedicated team of engineers works with clients from schematics to final construction.

Revit (BIM)

Orndorf & Associates, Inc. is proficient in Revit. This software allows for seamless integration with Revit Architecture and Revit MEP, enabling us to create a comprehensive building information model (BIM). BIM encompasses the use of a consistent, coordinated, and computable building model, as well as accurate construction documents and cost estimations. Revit enables us to work collaboratively with our architectural clients, streamlining coordination efforts and providing new opportunities for collaboration.

O&A Leadership Team


AIA Delaware Logo.png
American Institute of Steel Construction Logo.png
AIA Philadelphia Logo.png
National Trust for Historic Preservation Logo.png
American Society of Civil Engineers Logo.png
American Wood Council Logo.png
National Society of Professional Engineers Logo.png
Engineers Club of Philadelphia Logo.png
Association of Preservation Technology Logo.jpg
PA Society of Professional Engineers Logo.png
American Concrete Institute Logo.png
Dvase Logo.jpg
bottom of page