Mark’s Qualification
Mark Rohrbach, PE, is a geotechnical engineer with over 25 years of experience in soil mechanics, foundation design, and site investigations. He has led projects across residential, commercial, and large-scale infrastructure, specializing in soil testing, risk assessment, and innovative geotechnical solutions. Holding a Master’s in Civil Engineering from the University of Washington, Mark collaborates with architects, contractors, and agencies to ensure safe, efficient, and sustainable designs. A published expert and industry leader, he continues to advance geotechnical engineering through research and professional engagement.
Professional Certifications
Professional Engineer (PE), USA
Providence – Certificate Number
- Alaska – AELC11596
- Arizona – 78098
- California – 67197
- Idaho – P-14768
- North Dakota – PE-40995
- Oregon – 79011PE
- Texas – 148881
- Washington – 41335
Professional Geotechnical Engineer, USA
- Oregon – 79011PE
Professional Engineer (P.Eng.), Canada
Providence – Certificate Number
- Saskatchewan – 16338
- British Columbia – 162352
Publications:
“Contractor Designed Groundwater Control Using the Owner’s Data: A History and Recommendations for Betterment” co-authored with Frank W. Pita. Proceedings from the 48th Annual Conference on Deep Foundations, Deep Foundations Institute (Seattle, WA).
“Uncertainties in CSL Test Interpretations and Recommendations Toward a More Efficient Process” co-authored with T. Kovacs and Fadzilah Saidin. Proceedings from the 37th Annual Conference on Deep Foundations, Deep Foundations Institute (Huston, TX).
“Design and Construction of the lake tap tunnel at Lake Dorothy Hydro, Juneau, Alaska,” co authored with S. Brandon and M.L. Renegar. Proceedings of the 44th US Rock Mechanics Symposium and 5th U.S. Canada Rock Mechanics Symposium, American Rock Mechanics Association (ARMA 10-346).
“Innovative Use of Ground Improvement” co-authored with M. Koelling and L. Shao. Proceedings from the 35th Annual Conference on Deep Foundations, Deep Foundations, Deep Foundations Institute (Hollywood, CA).
Expertise:
Deep Foundation Analysis and Design, Retaining Wall Analysis and Design, Ground Improvement Design, Geo-Structural Engineering, Geotechnical Engineering, Construction Dewatering, Seismic Analysis, Non-Destructive Testing.