American Association of Drilling Engineers
The AADE is an all-volunteer organization made up of an affiliation of independent chapters licensed by the National Board.

California Ground Water Association
The CGA is a non-profit organization that has promoted protection of groundwater since 1948.

Geothermal Energy Association
The GEA is composed of U.S. companies who support the expanded use of geothermal energy and are developing resources worldwide for electrical power generation and direct-heat uses.

Geothermal Resource Council
The GRC serves as a focal point for continuing professional development for its members through its outreach, information transfer, and education services.

International Ground Source Heat Pump Association
Founded in 1987 the IGSHPA was established to advance ground source heat pump technology on local, state, national and international levels.

Society of Petroleum Engineers
Collect, disseminate, and exchange technical knowledge concerning the exploration, development and production of oil and gas resources.