Forensic Engineering

Geophysical Services

J.S. Held Acquires GLI Advisors, Strengthening Our Construction Project Support Services in the Western US and Hawaii

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J.S. Held provides a broad range of geophysical services to aid in the surface and subsurface assessment of the environment.

Our team has extensive experience surveying sites of all types and sizes to evaluate geological conditions.

For current firm engineering licensure info, click here.

Our Services
  • Borehole Geophysics
  • Coastal Erosion Assessments
  • Concrete Ground Penetrating Radar (GPR)
  • Crosshole Sonic Logging (CSL)
  • Concrete & Earthen Dam Assessments
  • Electrical Resistivity for Grounding Designs
  • Electrical Resistivity Imaging (ERI) Surveys
  • Evaluations of Base, Subgrade, Concrete & Asphalt
  • Geological Investigations
  • Ground Penetrating Radar (GPR) Surveys
  • Karst (Sinkhole & Cave) Evaluations – Southeast, Texas & Portions of the Caribbean
  • Magnetic Surveys
  • Microgravity Surveys
  • Pile Integrity Testing (PIT)

For additional information about our services and to help put you in touch with the appropriate expert across our global team, contact:

John Peiserich
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John Peiserich
Executive Vice President | Environmental, Health & Safety Practice Lead
Christopher Wilkens
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Christopher Wilkens
Senior Vice President | Forensic Architecture & Engineering
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