A number of employers in upstream and downstream oil and gas industries
- South Pars Gas Complex Company SPGC
- Pars Oil and Gas company
- Iran Central Regions Oil Company
- Continental Plateau Oil Company of Iran
- Arundan Oil and Gas Company
- Maron Oil and Gas Exploitation Company
- Gachsaran Oil and Gas Exploitation Company
- Aghajari Oil and Gas Exploitation Company
- Support company for production and supply of Tehran oil products
- Iran Gas Transmission Company
- Marine engineering and construction company
- South Zagros Oil and Gas Exploitation Company
- Iran Central Regions Oil Company
- National Company of South Oil-rich Regions
- Karun Oil and Gas Exploitation Company
