Our design philosophies are truly time-tested. We provide engineering excellence to clients in the public and private sectors, nationally and internationally. Our reputation as one of the most successful bridge and highway consulting engineering firms means that your project will be engineered to our signature hallmark standards established by our founding father in 1887 and improved upon by our current team of industry-leading engineers.

But don’t take our word for it. Our top ranking among the nation’s largest engineering firms is indicative of the caliber of our leadership, personnel, and the level of engineering resources that we make available to you.

Our design portfolio includes:


  • Interchanges
  • Major Highways
  • Urban Roadways
  • Rural Roadways
  • Vertical and Horizontal Alignments
  • Intermodal Facilities

Transit and Freight Rail 

  • Bridge-Fixed and Movable
  • Transit & Rail Systems
  • Rail Stations & Intermodal Facilities
  • Vehicle Maintenance Facilities

Fixed Bridge 

  • Simple Spans
  • Continuous Spans
  • Long Span
  • Segmental
  • Cable-Stayed

Movable Bridge 

  • Bascule Bridges
  • Vertical Lift Bridges
  • Swing Bridges
  • Specialty Movable

Special Structures

  • Cranes
  • Stadium Roof Moveable Systems
  • Moving Access & Inspection Platforms

Building Design (through our Strategic Partner – Thornton Tomasetti)

  • Main Structures
  • Supertall Buildings
  • Skin