HGI is a full service geotechnical consulting firm established in 2004. HGI is conveniently located in Carlsbad, California which allows us to mobilize for projects located in San Diego, Orange, Los Angeles and San Bernardino Counties. We hold professional engineering licenses in the States of California, Washington, Oregon, Colorado and Utah.

HGI’s range of project experience includes: 

  • Foundation and Earthwork Design
  • Geotechnical Hazard Remediation
  • Commercial and Residential Development
  • Geotechnical Observation and Testing
  • Seawall Design and Construction
  • Seismic Analysis and Retrofit
  • Public Works Projects
  • Failure Analysis

HGI also provides third-party geotechnical review for municipalities in discretionary permitting issues, as well as for commercial and residential developers. We have provided review services for the Cities of Encinitas, San Juan Capistrano and Rancho Palos Verdes.

We assist in the formulation of construction monitoring and response protocol where adjacent properties may be impacted by construction activities.

HGI prides itself in providing our clients with:

  • Personalized attention for any size project
  • Service to address project concerns without delay
  • Special requests to accomodate client needs
  • Solutions for projects with unique problems and constraints

Visit our  Projects  page to learn more about HGI's experience.

Mr. Stanley Helenschmidt is a California-registered Civil and Geotechnical Engineer with over 35 years of professional experience; specializing in investigation, analysis and mitigation of geotechnical hazards.

Mr. Helenschmidt has experience and has been retained as an expert in cases involving landsliding, soil settlement, expansive soil distress, construction issues and groundwater intrusion.

He was recently responsible for stabilization design of the Soledad Mountain Road Landslide in La Jolla, California which received an “Award of Excellence” from the American Society of Civil Engineers and an award for “Project of the Year” by the American Public Works Association.

Mr. Helenschmidt also routinely serves as a Subject Matter Expert for the State of California Board of Registration for Professional Engineers.

Stanley Helenschmidt, Registered Professional Geotechnical Engineer, Registered Civil Engineer with over 35 years of experience specializing in investigation, analysis and mitigation of geotechnical hazards


HGI awarded "ASCE Award of Excellence" for Soledad Mountain Road Landslide Remediation Project
HGI awarded "APWA Project of the Year" for the Soledad Mountain Road Landslide project


Member of American Public Works Association (APWA)
International Concrete Repair Institute

American Society for Testing of Materials


Combined Reservoir and Natural Water Treatment System
Helenschmidt Geotechnical, Inc. recently completed a geotechnical investigation for a combined reservoir and natural water treatment system in San Diego, California. The proposed project includes a series of shallow reservoirs/basins surrounded by compacted fill embankments. Subsurface exploration included hand auger borings and logging along the proposed project alignment. Slope stability analysis of proposed embankments under dry and saturated conditions were performed and recommendations were provided.