- Alberta Envirofuels
- Apache Canada
- Atco
- Athabasca Oil and Gas
- BA Energy
- Bearspaw Petroleum
- CH2MHill
- CNRL
- Cenovus
- Codeco
- Connacher Oil and Gas
- ConocoPhillips Canada
- Devon Energy
- DPH Focus
- Enbridge
- Encana Energy
- Enerplus
- Equinox Engineering
- ExxonMobil
- Fortis BC
- GasLiquids Engineering
- Grizzly Oil and Gas
- Harvest Energy
- Husky Energy
- InterPipeline Fund
- Karnalyte
- Legacy Oil and Gas
- Linc Energy
- MEG Energy
- Newfield Exploration
- Newstar Energy Ltd.
- Nexen Canada Ltd.
- Noetic Engineering
- Northwest Redwater Partnership
- Pembina Pipelines
- Pennwest Petroleum Ltd
- Provident Energy Ltd
- Resolute Energy
- Rheaume Engineering
- Second Wave Petroleum
- SemCAMS
- Shell Canada Ltd.
- Shell Chemical
- Sinopec Daylight
- Spectra Energy
- Statoil
- Suncor Energy Inc.
- Syncrude Canada
- Synenco Energy Inc.
- Sword Energy
- Total E&P
- Trilogy
- Weatherford
