Ninyo & Moore
- Geotechnical and environmental engineers, based in California.
- http://www.ninyoandmoore.com/

Field Geology Services
- John Field, PhD, fluvial geomorphologist based in New England (USA), offers short courses and services in flood hazard studies, stream restoration, GIS-based watershed assessment, and project monitoring.
- http://www.field-geology.com/

Advanced Environmental Solutions, LLC
- Environmental and geoscience consulting including site characterization, assessment and remediation design.
- http://www.advenvsoln.com/

Geotechnical Engineering Inc.
- Consultants in Geologic and Soil Engineering serving the greater San Francisco Bay Area since 1979.
- http://www.gei-ca.com/

Alan Kropp and Associates
- Geotechnical consulting firm located in Berkeley, California.
- http://www.akropp.com/

TXR Consulting
- Geology, geophysics, and geochemistry consulting company in South America.
- http://www.trxconsulting.com/

LunarAtlantic Earth Science Consultants
- Firm with a wide range of earth science specialities.
- http://www.lunaratlantic.com/

Wade Research
- Offers a wide range of consulting services in chemistry, with experience in soil and groundwater remediation, environmental impact assessment, litigation support, and expert testimony.
- http://www.waderesearch.com/

Exploration Technologies, Inc.
- Provides exploration and environmental geochemistry services, including soil vapor site assessments, seismic geochemistry, and product fingerprinting for contaminant spills. Site includes a collection of published professional papers.
- http://www.eti-geochemistry.com/

Geocon
- Management and consultancy services in all aspects of exploration, engineering, information technology, safety and the environment.
- http://www.geocon.com/

Golder Associates
- Providing comprehensive civil/geotechnical and environmental consulting services to a wide range of industries worldwide.
- http://www.golder.com/

Providence Oil Company
- Specializing in geological analysis and seismic studies.
- http://www.providenceoil.com/

Osiris Projects
- Hydrographic and geographic survey specialists, ISO 9002 accreditation specifically for carrying out this type of work.
- http://www.osirisprojects.co.uk/

Precious Metal Exploration Maps
- Exploration maps, assaying of ore samples and interpretation of geological and geophysical data by a seasoned geologist, G.H.Hamilton.
- http://www.explorationgeologist.com

NorthWest Research Associates, Inc.
- Contract-research firm conducting in-depth investigations in the physical sciences and providing consulting services to government and industry. Expertise ranges from atmospheric, ocean, and sea ice sciences, to fundamental geophysical fluid dynamics and
- http://www.nwra.com/

Haneberg Geoscience
- Consulting and applied research solutions in engineering geology, hydrogeology, and applied geomechanics. Landslides, mudslides, debris flows, land subsidence, and other geologic hazards. GIS applications in natural resource and watershed assessments.
- http://www.haneberg.com/

Geo-Marine Technology
- Marine geology and geophysics consultancy services to offshore oil and gas industries, offshore survey industries, and governments.
- http://www.geomarinetech.com/

Cotton, Shires & Associates, Inc.
- Professional geotechnical firm, providing consulting and litigation services throughout the western United States.
- http://www.cottonshires.com/

Earth Research
- Earth Sciences research and data analysis service, focusing on geography, geology, geoscience, and the environment.
- http://www.earthresearch.com/

BGC Engineering Inc.
- Specialist consulting services in applied earth sciences, with specific emphasis on the application of geotechnical and geo-environmental engineering, and engineering geology.
- http://www.bgcengineering.ca/