- John M. Campbell and Company
 - Specialised in international training, publishing, and consulting for the gas/oil industry. - Maurer Engineering
- Provides petroleum well engineering training courses and software programmes for reservoir, drilling, completions, and coiled tubing professionals as well as for underbalanced operations.
- PetrEX International
- Provides customised training workshops and consulting for the oil and gas industry in the areas of performance improvement, technical/operational skills, and leadership/interpersonal skills.
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