- American Association of Petroleum Geologists
- American Geological Institute
- American Geophysical Union
- Arizona Geological Society
- Asia Oceania Geosciences Society
- Association of Environmental & Engineering Geologists
- Australian Institute of Geoscientists
- British Geological Survey
- Coast Geological Society
- Environmental and Engineering Geophysical Society
- European Association of Geoscientists and Engineers
- Geological Society of America
- Geological Society of Glasgow
- Geological Society of India
- Geological Society of London
- Geological Society of Washington
- Geologists' Association
- Geoscience Australia
- International Union of Geological Sciences
- Japan Geoscience Union
- Mining, Geological & Metallurgical Institute of India
- Myanmar Geosciences Society
- National Association of State Boards of Geology
- Norwegian Geological Survey
- Pacific Section American Association of Petroleum Geologists
- Petroleum Exploration Society of Australia
- Royal Geological Society of Cornwall
- Society of Exploration Geophysicists
- Society for Mining, Metallurgy, and Exploration
- The Society for Organic Petrology
Companies associated with Geology and Earth Science Oilexco Incorporated:
- Penneco Oil Company, Inc.
- Pioneer Oil and Gas
- Premier Oil
- British Gas
- Eurogas Corporation
- Cameron
- Colibrys Switzerland
- EMS Energy
- ExproSoft
- Fairmount Marine
- Ocean Maxwell
- Radoil (Reel Power International Subsidiary)
- Saxon Energy Services, Inc.
- SinSco Project Management
- Swanson Industries
- Task Environmental Services Worldwide
- Lamprell Energy Lt
- Dubai Petroleum
- Burley SubSe
- Dragon Oil
- Likpin LLC
- RTE Group
- Specialist Services
- Occidental M E Development Co
- Aeroquest Limited
- AES Marine Consultants, LLC
- Air Quality Services (AQS)
- Alpha Geoscience Pty Ltd
- American Association of Petroleum Geologists (AAPG)