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About Us

Our History

Providing engineering and scientific services directly related to the economic growth of the nation and the world.

D’Appolonia was founded in 1956 by Dr. Elio D’Appolonia as an outgrowth of private consulting work that he performed while a member of the civil engineering faculty at Carnegie Institute of Technology, now Carnegie Mellon University.

The firm has always had its headquarters in the Pittsburgh, PA area and our office is currently located 15 miles east of Pittsburgh. Dr. D’Appolonia was an internationally recognized figure in geotechnical engineering and maintained an active lifestyle and continuing affiliation with the firm, until his passing in December of 2015.

Our business is based upon close working relationships with our clients.

Our business is based on over 60 years of experience working closely with our clients as both a partner and advisor on each project.

Our engineers take the time to thoroughly discuss the issues and challenges with our clients so that we can work cohesively, resulting in the most cost-effective and technically-sound solutions possible.

Our technical staff members stay up-to-date in the development of their technical professions, allowing us to implement both traditional and state-of-the-art technologies in our engineering analyses and designs. A high percentage of our work is repeat business from existing clients, some of whom we have worked with for decades. In the years since its founding, D’Appolonia has provided engineering and scientific services directly related to the economic growth of the nation and the world.

Our Vision
  • Grow with an enduring presence
  • Continue to be well-respected technically and be an example of ethical and professional behavior
  • Provide meaningful contributions to the community
  • Maintain a collegial workplace environment while promoting personal and professional growth
  • Provide value-added and high-quality services
  • Exceed client expectations
  • Value teamwork and Cooperation

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