Geo-Technologies, Inc. (GTI) is an environmental, geotechnical and materials engineering consulting firm composed of engineers, geologists, scientists, and technicians. Services are provided regionally, nationally and internationally with headquarters in Scottsdale, Arizona. We also have full service offices in Tucson, Arizona, Guadalajara, and Mexico City, Mexico.



GTI has been certified by AMRL, CCRL, and the City of Phoenix. Field technicians with GTI are certified with the Arizona Technical Testing Institute (ATTI), American Concrete Institute (ACI), and City of Phoenix certification to conduct soils, concrete, and asphalt testing.



GTI is committed to the principles of client service, responsiveness, and sound practical professional advice. Throughout our history, we pride ourselves on providing the highest quality engineering services and on developing the most cost effective and innovative solutions that address the needs of our clients.



We are registered professional engineers in more than 26 states and are available to service all your engineering needs. The key members of the firm have worked in the western United States for over 35 years, and have gained national and international recognition for their ability to find innovative and cost saving solutions to difficult geotechnical and environmental problems.



In the past 12 years GTI has become a recognized expert in various aspects of the development and engineering industry. GTI is able to provide professional engineering services to our clients across the United States. The Key members of the firm have provided a wide range of services from feasibility studies through design and construction. A partial list of some of our services include:


  • Geotechnical Subsurface Explorations

  • Phase I Environmental Site Assessments

  • Phase II Site Characterization Studies

  • Phase III Site Remediation Services

  • Seismic Refraction Surveys

  • Foundation Integrity Evaluations

  • Archeological & Biological Studies

  • Special Foundation Analysis & Design

  • Foundation Design Services

  • Post Tensioned Slab Recommendations

  • Special Inspection Services

  • Material Engineering & Testing Services

  • Foundation Integrity Evaluations

  • Forensic Investigations

  • Mold Investigations

  • Retaining Wall Recommendations

  • NEPA Checklist and Full NEPA & SHPO Services




































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