William K. Petersen

Senior Consultant / P.E. / Philadelphia


With a background in both geology and geotechnical engineering, Mr. Petersen has over 28 years of diverse experience, including site investigations, geotechnical/geostructural analyses, design, expert witness testimony, and construction services for projects involving highways, railroads, and commercial, industrial, marine, and residential facilities.

Mr. Petersen has performed forensic evaluations and developed emergency repair recommendations for projects involving landslides, dams, tunnels, karst activity (sinkholes), subsidence of structures, soil nail walls, and foundation construction defects. He has led the geotechnical efforts for several large highway and railroad reconstruction projects, having responsibility for project management, oversight of subsurface exploration and laboratory testing programs, and the development of foundation recommendations, design drawings, specifications and cost estimates. Throughout his career, he has prepared geotechnical reports and provided design and construction recommendations for a wide range of projects throughout the United States.

Mr. Petersen recently completed a term as President of Delaware Valley Geo-Institute (DVGI), and has remained actively involved in the industry, serving on various committees, teaching short courses, giving presentations, and volunteering as an editorial board member. He regularly attends association meetings, conferences, short courses and webinars as part of continuing education. 

Education and Registrations

  • MS Engineering Geology, Purdue University
  • BSE Geological Engineering, Purdue University
  • BS Geology, Bowling Green State University
  • Registered Professional Engineer – Pennsylvania