Register of Experts Directory

Patrick O. Shires

Patrick O. Shires

President/Principal Geotech. Engr./Principal Geophysicist

Cotton, Shires and Associates, Inc.

330 Village Lane
Los Gatos, CA 95030-7218
Phone: (408) 354-5542 Email: Website:


Geotechnical (soils) Engineering; Earthquake Engineering; Geology; Design & Construction Deficiencies; Landslides (earth movement); Expansive Soil. Drainage. Trials; More than 30 trials in Los Angeles area; more than 90 trials in California & Hawaii.



Formal Education

BS, Stanford University; MS, Civil Engineering, Stanford University.

Registration and Licenses

Registered Professional Engineer (CA, CO, OR, WA, ID, HI); Registered Geotechnical Engineer (CA); Registered Geophysicist (CA).

Previous/Current Position

Senior Principal Geotechnical Engineer and Geophysicist.


Industrial Research Associate, USGS; Technical Experts Panel, City of Rancho Palos Verdes.

Prof. Affiliations

American Society of Civil Engineers; Earthquake Engineering Research Institute; CA Geotechnical Engineers Association; Consulting Engineers of CA; American Society of Testing and Materials; Society of Exploration Geophysicists.


ASCE Journal of Geotechnical Engineering and conference papers.

Prior Expert

Over 47 years experience, Testimony at 90+ trials (Municipal, Superior and Federal and binding arbitrations); 230+ depositions; 300+ settlement conferences; Northern and Southern California and Hawaii.