Forensic Engineering

Geophysical Services

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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.

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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)
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J.S. Held

Headquarters

50 Jericho Quadrangle
Suite 117
Jericho, N.Y. 11753
+1 516 621 2900
[email protected]

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© 2025 J.S. Held LLC.  

All Rights Reserved.

J.S. Held, its affiliates and subsidiaries are not certified public accounting firm(s) and do not provide audit, attest, or any other public accounting services. J.S. Held is not a law firm and does not provide legal advice. Securities offered through PM Securities, LLC, d/b/a Phoenix IB or Ocean Tomo Investments, a part of J.S. Held, member FINRA/SIPC. All rights reserved.
J.S. Held

Headquarters

50 Jericho Quadrangle
Suite 117
Jericho, N.Y. 11753
+1 516 621 2900
[email protected]

J.S. Held, its affiliates and subsidiaries are not certified public accounting firm(s) and do not provide audit, attest, or any other public accounting services. J.S. Held is not a law firm and does not provide legal advice. Securities offered through PM Securities, LLC, d/b/a Phoenix IB or Ocean Tomo Investments, a part of J.S. Held, member FINRA/SIPC. All rights reserved.
Markets Served

Geographies

Industries

Media Relations

[email protected]

© 2025 J.S. Held LLC.  

All Rights Reserved.

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