Our Team

Eldon Gath

Eldon Gath

President and Senior Partner

Eldon Gath, Founder and President of ECI, is a leader in the engineering geology profession, both technically and professionally for over 30 years. He has developed award-winning public safety hazard management plans, led geological and seismic investigations for dozens of $250M-$5B development and infrastructure projects, represented both plaintiffs and defendants in civil litigation cases involving upwards of $3B in claims, written dozens of published papers including two “papers of the year” awards, given hundreds of technical talks to colleges, professional meetings, and civic organizations including a year as a “distinguished lecturer in applied geology”, and has served as the President of the Association of Environmental and Engineering Geologists and the North American Vice President for the International Association for Engineering Geology and the Environment. His projects have spanned ten countries from Turkey to Papua New Guinea, including quantifying the seismic history and hazard of central Panama for the Panama Canal expansion project. His experience includes paleoseismic investigations of dozens of faults, coastal LNG siting, municipal and county hazard management plans, dam, canal and tunnel design studies, landslide and debris flow hazard investigations, highway and bridge design investigations, seismic design models, wind turbine siting studies, and dozens of land development planning and environmental impact studies. He is a Past-President and Honorary Member of the South Coast Geological Society, a Past-President and Life Member of the Association of Environmental and Engineering Geologists, and a Fellow of the Geological Society of America.

More Info/ Contact

Tania González

Tania González

Vice-President and Senior Partner

Ms. Tania González has nearly 30-years experience in site evaluation and geological feasibility studies, with an emphasis on using soil-stratigraphic and geomorphic techniques to estimate the age of paleo-surfaces and to characterize the recency and magnitude of activity of faulting. She has successfully coordinated and managed complex field studies that involved mobilizing several subcontractors and field personnel at once. Her experience includes field mapping, logging and documenting trenches and excavations, drilling (auger and rotary), and down-hole logging of bucket borings for landslide and fault studies. She also has extensive experience in the interpretation of cone penetration test (CPT) data for fault investigations, and in absolute and relative dating techniques. Ms. Gonzalez has also managed and prepared dozens of urban planning studies, including Safety Elements, Local Disaster Mitigation Plans, Specific Plans, with emphasis on geological hazard mitigation and vulnerability assessments.  She has made presentations summarizing the findings of these studies to City Councils, City Planning Committees, General Plan Advisory Committees, and State agencies such as the States Land Commission. She has also prepared and hosted many public workshops presenting the technical findings of natural hazard assessment studies and obtain feedback on mitigation actions favored by the community. Ms. Gonzalez is fluent in Spanish.

More Info/ Contact

Cristin Allison

Cristin Allison

Office Manager

Anders Hogrelius

Anders Hogrelius

Senior Geologist

Mr. Anders Hogrelius completed his M.S. (with Honors) degree in 2005 at Uppsala University in Sweden. During his studies he specialized in Structural Geology and Tectonics and was a pioneer in the use of Satellite Interferometry (InSAR) for the mapping of surface deformation in Sweden. Mr. Hogrelius has many years of experience in Structural and Economic Geology and has worked in Scandinavia for a number of mineral exploration companies including Tertiary Minerals LTD, Lundin Mining Exploration AB, Hansa Resources LTD and Tumi Resources LTD. Through his membership in the Australian Institute of Geoscientists, AIG, he is qualified to act as a Qualified Person (QP) pursuant to Canadian National Instrument 43-101 and as a Certified Professional (CP) pursuant to the Australian JORC code. Currently he serves as the Qualified Person for Tumi Resources LTD’s projects. He is well versed in the use of Trimble and Ashtech GPS systems and has an excellent knowledge of several GIS and CAD systems including MapInfo, Geosoft, AutoCAD, Autodesk MAP, ArcVIEW/ArcGIS and ENVI.

More Info/ Contact

Maria Herzberg

Maria Herzberg

Senior Staff Geologist

Ms. Herzberg has over 14 years of experience in geological studies with an emphasis in Quaternary geology, soil stratigraphy, and geomorphology. She has experience in collection and documentation of geological field data and laboratory analyses of geological samples. She has participated in numerous fault trenching projects in Southern California, Mexico and Panama, and has supervised both field and laboratory personnel. She has experience with PC and Macintosh systems and is proficient with various word processing, spreadsheet, drafting (including Canvas and Adobe Illustrator), and Geographical Information Systems (GIS) programs (including MapInfo and Vertical Mapper). She has had experience in GIS data collection, map creation, data management and data presentation.

More Info/ Contact

Taylor Bogdanovich

Taylor Bogdanovich

Staff Geologist

Ms. Taylor Bogdanovich has over 5 years of experience in assisting fault investigations, landslide investigations, and other geologic hazard mitigation projects. She is an experienced field technician with emphasis on the preparation of geological trenches, logging of geotechnical borings, and soil description. Ms. Bogdanovich has academic experience and assisted during paleoclimate research at California State University, Long Beach. For years, she has been active at the South Coast Geological Society in Orange County and currently serves as vice-president. Ms. Bogdanovich is also experienced with organization of field data, Microsoft Excel, and Google Earth applications.

More Info/ Contact

Yannick Wirtz

Yannick Wirtz

Project Geologist

Yannick Wirtz’ expertise focuses on structural geology, petroleum systems, and active tectonics in Southern California. He completed an MS in Geology at Long Beach State University after completing a BS degree in Applied Geology at RWTH Aachen University of Technology in Germany. Mr. Wirtz worked with the Monterey and Related Sediments (MARS) research group, a petroleum industry affiliates program on the Monterey Formation of California incorporating field methods, structural geology, sedimentology, and tectonics in his research and he conducted climate research at UC Irvine as part of his BS degree thesis. At Earth Consultants International, he gained experience in southern California geology and engineering geology practice. Since 2016, Mr. Wirtz works as a full time consultant and became experienced and skilled in Geologic Hazard Mitigation projects, interpretation of geologic structures, GIS database management, report writing, terrain modeling, graphic and map generation, data presentation, and website development. He has been active in the geology community worldwide throughout his academic and professional career, presented award receiving talks, and lead field trips at several science symposiums and professional societies.

More Info/ Contact