Professional Activities

American Geophysical Union (1989 - present)

American Institute of Professional Geologists (1993-present)

American Society of Civil Engineers (1975-present) elected member 1984

American Society for Photogrammetry and Remote Sensing (1990-present)

American Society for Testing and Materials (1985-97), Committee D-19 (1986-89)

Association of Engineering Geologists (1976 - present)

Earthquake Engineering Research Institute (1989 - present)

Geological Society of America (1975-present), Fellow (1996)

International Association of Engineering Geologists (1993-present)

International Commission on Large Dams (1980 - present), Life Member (1988)

International Landslide Research Group (1992 - present)

International Society for Rock Mechanics (1984-1995)

International Society for Soil Mechanics & Foundation Engineering (1987-97)

National Society of Professional Engineers (1989 - present)

United States Society of Dams (1980 - present), Life Member since 1988

Technical Advisory Committee on Grading Standards for the California Geological Survey (March 2004 - present)

Member, Independent Panel to Investigate the Failure of the Dead Sea Dike 19 for the Hashemite Kingdom of Jordan (2000-2001)

Technical Advisory Committee on Regional Geologic Studies and Slope Stability Modeling for State of California, Department of Conservation, California Geological Survey (1999-2001)

Earthquake-Induced Landslide Hazards Working Group, California Department of Conservation, California Geological Survey (1996-98)

Building Codes Committee of the Association of Engineering Geologists (1990-present, Chair 1992-97)

Dam Safety Committee of the Association of Engineering Geologists (2001-present)

Archivist, Engineering Geology Foundation, 2001-present

Cal Poly Science Technologies Building Advisory Committee, September 1996 to October 1999

Earthquake-Induced Hazards Landslide Working Group panelist, California Division of Mines & Geology, appointed February 1996; served till Dec 1998.

U.S. Geological Survey-National Earthquake Hazard Reduction Program review panelist 1992-96

City of Calabasas Geology Review Board 1992-93

Member, Engineering Geology Advisory Committee for the City of Los Angeles, July 1990 to June 1998

External Reviewer for Volume III-Federal Highway Administration Seismic Retrofitting of Slopes, Embankments and Rockfalls, for National Center for Earthquake Engineering Research 1996-97

Scott Dam Technical Review Board for Pacific Gas & Electric Co., 1995-96

Member, General Design and Lateral Design Code Development Committee, International Conference of Building Officials, March 1990 to April 1994

Geotechnical Steering Committee and Vice Chair, San Francisco Section of the American Society of Civil Engineers 1991-95

Examination Committee, Board of Registration for Geologists and Geophysicists, Department of Consumer Affairs, State of California, 1992-94

Seismic Zonation Subcommittee, Structural Engineers Association of Northern California, 1990-92

Adhoc Advisory Panel on Seismic Vulnerability of the San Francisco-Oakland Bay Bridge for the California Department of Transportation, 1990-93

Executive Board, San Francisco Bay Area Squadron of the Association of Naval Aviation, 1987-91

Geotechnology Advisory Committee, Diablo Valley College 1987-89

U. S. Committee on Rock Mechanics of the National Research Council, 1984-96

Advisory Board for the Urban Creeks Council (1984-88)