IPIP IPIP (also known as the Engineering and Design Institute for Oil Refineries and Petrochemical Plants) is an engineering and design company focusing on petroleum, hydrocarbon processing, petrochemical, and related industries. | ![]() Gulf Interstate Engineering Gulf Interstate Engineering is a company that provides project management, engineering and design, GIS, procurement, pipeline integrity, field inspection, and construction management services to the oil and gas industry. | ![]() Sofregaz Sofregaz is a company providing engineering and design consultancy services to the oil and gas industry. | ![]() Dudek Dudek is an environmental company that helps clients plan, design, and build construction projects. | |
Founding Date | Founding Date 1950 | Founding Date 1953 | Founding Date 1959 | Founding Date 1980 |
Type | Type Subsidiary | Type Subsidiary | Type Private | Type Private |
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Locations | Locations Ploiesti, RO HQ | Locations Houston, US HQ | Locations Puteaux, FR HQ | Locations Encinitas, US HQ Auburn, US Bakersfield, US Kailua, US Lake Worth, US Norfolk, US Oakland, US see more |
Employees | Employees 1661% decrease | Employees 7002% decrease | Employees 1241% increase | Employees 7623% increase |

Gulf Interstate Engineering is a company that provides project management, engineering and design, GIS, procurement, pipeline integrity, field inspection, and construction management services to the oil and gas industry.
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Sofregaz is a company providing engineering and design consultancy services to the oil and gas industry.
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Dudek is an environmental company that helps clients plan, design, and build construction projects.
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