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Forensic Architecture & Engineering

Geophysical Services

Learn more about J.S. Held's recent acquisitions of VWM Analytics and Twenty First Century Engineering.

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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 engineering licensure info, click here.

  • 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)
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