• Thelen Associates, a Division of Geotechnology

  • Questions? Call Us 314-997-7440

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Thelen Associates, a Division of Geotechnology, Inc.:

  • Over 280 employees
  • 36 Professional Engineers
  • 20 Registered/Professional Geologists
  • 5 Environmental Scientists
  • 5 Geophysicists
  • 53 Drillers/Drillers Helpers
  • 121 Technicians
  • 43 Administrative/Sales
  • 22 Exploration rigs, including 1 – 20 ton CPT rig
  • 2 Cone Penetration Test Sets (CPT) including one shear wave cone
  • 4 Crosshole Sonic Logging System (CSL)
  • 3 Pile Dynamic Anlayzers (PDA)
  • 2 Pile Integrity Testers (PIT)
  • 2 Downhole Cameras
  • Services include geotechnical engineering, construction materials testing, geophysics, water resource management, environmental engineering, and drilling
  • Full compliment of surface and borehole geophysical instructment for imaging geotechnical and environmental targets
  • Laboratories are AASHTO certified and our labs in Missouri, Kansas, Illinois, Kentucky, and Tennessee are USACE validated