The petroleum refining equipment installation industry focuses on the assembly and maintenance of the vital mechanisms used to convert crude oil into usable products. Companies in this sector range from large engineering firms to smaller specialized contractors, each providing services that optimize refining processes. With an increasing push for environmentally sustainable practices, these firms are exploring new technologies that minimize emissions and enhance energy efficiency. As the demand for renewable fuels rises, the industry is pivoting, integrating greener practices while maintaining operational efficacy in traditional refining processes.

This listing comprises 23 companies with varied profiles in the petroleum refining equipment installation sector. Spanning across multiple countries including the USA, Iran, and France, these firms were founded between the early 1900s to recent years. Specializations include engineering, project management, maintenance, and fabrication, reflecting the breadth of expertise available—from large players with thousands of employees to nimble firms with smaller teams. This variety illustrates the industry's capability to cater to a wide range of refining needs.

Continue reading to explore the top petroleum refining equipment installation companies.

Top 23 Petroleum Refining Equipment Installation Companies

1. Ohmstede, Ltd.

• Website: ohmstede.com
• Ownership type: Corporate
• Headquarters: Beaumont, Texas, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Latest funding: September 2007
• Founded year: 1905
• Headcount: 501-1000
• LinkedIn: ohmstede-ltd-

Ohmstede, Ltd. is an industrial services company based in Beaumont, Texas, with a rich history dating back to 1905. Initially founded as an automotive repair shop, the company pivoted to support the burgeoning petroleum refining industry following the discovery of oil at Spindletop. Today, Ohmstede specializes in the maintenance, repair, and fabrication of process equipment, with a particular emphasis on heat exchangers, which are vital for efficient refining operations. They serve clients in the petroleum refining and petrochemical sectors, providing essential services that enhance operational efficiency and safety. Ohmstede operates through a combination of field and shop services, allowing them to meet a variety of client needs, from scheduled maintenance to emergency repairs. Their commitment to quality and safety is evident in their operational practices, making them a trusted partner in the industry.

2. PetroForce

• Website: petroforce.co
• Ownership type: Private
• Headquarters: Tehran, Tehran, Iran
• Employee distribution: Iran 58%, Netherlands 21%, Cote d'Ivoire (Ivory Coast) 21%
• Founded year: 2011
• Headcount: 1001-5000
• LinkedIn: petroforce

PetroForce Industrial Group, founded in 2011 and based in Tehran, Iran, is an engineering contractor that specializes in the oil, gas, and petrochemical industries. The company provides a wide range of services, including project management, engineering, procurement, and construction of various types of plants. Their portfolio includes mini refinery plants, gas condensate production facilities, and bitumen production plants, among others. PetroForce also manufactures essential equipment such as heat exchangers, distillation towers, and pressure vessels, which are critical for refining operations. With a workforce of over 1,000 employees, the company has established a strong presence in both local and international markets, serving clients who require expertise in the design and implementation of complex projects. Their commitment to quality and customer satisfaction is evident in their operational practices and project execution.

3. Richard Industrial Group

• Website: richardig.com
• Ownership type: Private
• Headquarters: Beaumont, Texas, United States (USA)
• Founded year: 2004
• Headcount: 1001-5000
• LinkedIn: richard-design-services-inc

Richard Industrial Group, based in Beaumont, Texas, is a private engineering firm established in 2004. With a workforce of over 1,000 employees, the company focuses on providing comprehensive engineering, procurement, and construction services to the refining, petrochemical, and energy industries. Richard Industrial Group is known for its ability to manage complex projects from inception to completion, ensuring that safety and quality are prioritized throughout the process. Their portfolio includes a variety of projects related to the installation and maintenance of petroleum refining equipment, such as sour water strippers and hydrocracking units. The firm has built a reputation for delivering tailored solutions that meet the specific needs of their clients, which include major industry players like BASF, Chevron, and Valero. Richard Industrial Group also emphasizes community involvement, reflecting a commitment to positive impact beyond their industrial activities.

4. Axens

• Website: axens.net
• Ownership type: Private
• Headquarters: Rueil-Malmaison, Île-De-France, France
• Employee distribution: France 74%, United States (USA) 10%, India 7%, Other 9%
• Founded year: 2001
• Headcount: 1001-5000
• LinkedIn: axens

Axens, founded in 2001 and based in Rueil-Malmaison, France, is a technology provider that specializes in refining and petrochemical solutions. With a workforce of approximately 1,638 employees, the company operates primarily in the refining and petrochemical sectors, offering a wide array of services. These include technology licensing, process design, and equipment supply, which are crucial for enhancing production efficiency and sustainability in the industry. Axens is recognized for its advanced technologies that support the conversion of oil, natural gas, and biomass into cleaner fuels, as well as the production and purification of major petrochemical intermediates. Their offerings also extend to consulting, technical support, and modular units, ensuring comprehensive coverage of the entire value chain in refining operations. Axens has established a global footprint, with a significant portion of its workforce located in France, and maintains a strong presence in the United States, India, and other regions.

5. Rototech Ltd - Energy & Industrial Projects

• Website: rototech.gr
• Ownership type: Private
• Headquarters: Acharnes, East Attica Regional Unit, Greece
• Employee distribution: Ireland 100%
• Founded year: 2010
• Headcount: 51-200
• LinkedIn: rototech-ltd

Rototech Ltd - Energy & Industrial Projects, founded in 2010 and based in Acharnes, Greece, is a private industrial services company. With a workforce of around 19 employees, the firm focuses on executing complex projects in various sectors, including power generation and oil refining. They provide a comprehensive range of services, including construction, maintenance, and repair, aimed at ensuring efficient operations and minimizing downtime for their clients. Rototech has demonstrated its capabilities in the oil refining sector through its involvement in projects such as the ELPE refinery upgrading in Thessaloniki. The company prides itself on its skilled workforce and well-maintained equipment, which allows them to handle projects with high levels of complexity and special requirements. Their commitment to quality and safety is reflected in their certifications, including ISO standards for quality management and occupational health and safety.

6. Azar Energy Tabriz

• Website: azarenergy.com
• Ownership type: Private
• Headquarters: Tabriz, East Azerbaijan, Iran
• Employee distribution: Iran 100%
• Founded year: 1988
• Headcount: 51-200
• LinkedIn: azar-energy-tabriz

Azar Energy Tabriz, established in 1988, is a private manufacturer based in Tabriz, East Azerbaijan, Iran. The company focuses on producing equipment tailored for the oil, gas, refining, and petrochemical sectors. Their product line includes tower internals, flame arresters, mixers, strainers, stacks, and pressure vessels. Azar Energy also offers a range of services, including process studies, troubleshooting, and mechanical installation. The company has successfully completed numerous projects, such as the Vacuum Revamping Tower project for Tehran Petrochemical Company and various installations for major refineries like Isfahan and Kermanshah. Their commitment to quality is underscored by their ISO 9001:2008 certification from TÜV NORD Germany, reflecting their adherence to international standards in manufacturing and service delivery.

7. Polaris Engineering

• Website: polarisepc.com
• Ownership type: Private
• Headquarters: Lake Charles, Louisiana, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1996
• Headcount: 51-200
• LinkedIn: polaris-engineering-inc.

Polaris Engineering, also known as Polaris EPC, is a private engineering and construction firm based in Lake Charles, Louisiana. Founded in 1996, the company has built a solid reputation over its 25 years of operation, primarily serving the refining and petrochemical industries. Polaris offers a comprehensive suite of services that includes engineering, fabrication, field construction, and project management. Their expertise extends to various aspects of petroleum refining, such as refinery refurbishments, emergency designs, and process unit debottlenecks. The company prides itself on delivering innovative solutions to operational challenges faced by its clients. With a dedicated workforce of 51-200 employees, Polaris has established an international presence, serving clients across multiple countries and continents. Their commitment to safety, quality, and customer service is evident in their project execution and client relationships.

8. RAMPCO Group

• Website: rampcogroup.com
• Ownership type: Private
• Headquarters: Tehran, Tehran, Iran
• Employee distribution: Iran 93%, Venezuela 6%, Other 1%
• Founded year: 1992
• Headcount: 1001-5000
• LinkedIn: rampco

RAMPCO Group, founded in 1992 and based in Tehran, Iran, operates as a private EPC contractor specializing in the oil and gas, petrochemical, and refinery sectors. With a workforce of approximately 2,500 employees, the company has established itself as a significant player in the industry, providing services that range from project management and engineering to construction and maintenance. RAMPCO has successfully executed numerous projects, including the construction and maintenance of complex processing units and facilities. Their commitment to safety and quality is reflected in their adherence to international standards, as evidenced by their various certifications. The company has also expanded its operations internationally, with a notable presence in Venezuela and other regions. RAMPCO's focus on delivering efficient and safe solutions for complex projects makes it a relevant entity in the petroleum refining equipment installation sector.

9. Richard

• Website: richardepc.com
• Ownership type: Private
• Headquarters: Beaumont, Texas, United States (USA)
• Employee distribution: United States (USA) 87%, India 13%
• Founded year: 2004
• Headcount: 1001-5000
• LinkedIn: richard-design-services-inc

Richard EPC, founded in 2004 and based in Beaumont, Texas, is a private engineering firm that specializes in engineering, procurement, and construction services for the refining, petrochemical, and energy industries. With a workforce of over 800 employees, Richard EPC has established itself as a reliable partner for large industrial clients. The company offers a comprehensive range of services, including project execution, maintenance, and procurement, ensuring that projects are completed safely and efficiently. Richard EPC has been involved in various significant projects within the petroleum refining sector, including the installation of critical refining units and equipment. Their client portfolio features prominent names such as BASF, Chevron, and ExxonMobil, showcasing their active engagement in the industry. The firm also emphasizes safety as a core value, striving for zero incidents in all operations, which is essential in the high-stakes environment of petroleum refining.

10. Orion.Group

• Website: oriongr.com
• Ownership type: Private
• Headquarters: Kriukivshchyna, Kyiv Oblast, Ukraine
• Employee distribution: Ukraine 69%, Poland 23%, Portugal 9%
• Founded year: 1995
• Headcount: 201-500
• LinkedIn: oriongr

Orion.Group, founded in 1995 and based in Kriukivshchyna, Kyiv Oblast, Ukraine, is a private company that provides mechanical and electrical installation services. They cater to the food, chemical, and oil refining industries, showcasing their versatility. The company manufactures stainless steel equipment and offers comprehensive installation solutions, which include complex mechanical installations, welding, and commissioning. Orion.Group has executed over 1,000 projects across more than 50 countries, demonstrating their operational reach. Their workforce consists of around 250 qualified specialists, ensuring a skilled approach to their projects. They hold several certifications, including ISO 9001:2015 and ISO 14001:2015, which reflect their commitment to quality and environmental management.

11. Namvaran Consulting Engineers, Managers

• Website: namvaran.ir
• Ownership type: Private
• Headquarters: Tehran, Tehran, Iran
• Employee distribution: Iran 100%
• Founded year: 1979
• Headcount: 501-1000
• LinkedIn: namvaran-consulting-engineers-managers

Namvaran Consulting Engineers, Managers, established in 1979, is a private engineering and consulting firm based in Tehran, Iran. The company focuses on the oil, gas, petrochemical, and mining industries, providing a wide range of services that include engineering, procurement, and construction management. Namvaran has built a solid reputation through its involvement in over 250 projects, showcasing its expertise in the development of petroleum refineries and related facilities. Notably, they played a pivotal role in the Siraf Gas Condensate Refinery Project, which is part of a larger initiative to enhance Iran's refining capabilities. Their approach emphasizes customized solutions and cost optimization, ensuring that projects meet the specific needs of their clients while adhering to high standards of quality and efficiency. Namvaran's commitment to innovation and professional excellence has made it a trusted partner in the oil and gas sector.

12. Fateh Group

• Website: fatehgroup.com
• Ownership type: Private
• Headquarters: Cherryfield, Maine, United States (USA)
• Employee distribution: Iran 97%, Other 3%
• Founded year: 1989
• Headcount: 1001-5000
• LinkedIn: fatehgroup

Fateh Group, founded in 1989, is a private company based in Cherryfield, Maine, with a significant operational presence in Iran. The company specializes in engineering and construction services across various sectors, including oil and gas, petrochemical, chemicals, and energy. Fateh Group offers a wide range of services such as project management, fabrication, and maintenance, focusing on enhancing productivity and optimizing operations for its clients. Their involvement in the petroleum refining sector is notable, as they have been key participants in major refinery and petrochemical projects in Iran. The company prides itself on its engineering capabilities and has developed a strong portfolio of process equipment and technology tailored for the refining industry. With a workforce of over 6000 employees and 24 subsidiaries, Fateh Group is well-equipped to meet the challenges of the energy sector, providing integrated solutions from design to commissioning and operation.

13. The Stronghold Companies

• Website: thestrongholdcompanies.com
• Ownership type: Corporate
• Headquarters: La Porte, Texas, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Latest funding: May 2021
• Founded year: 2009
• Headcount: 5001-10000
• LinkedIn: the-stronghold-companies

The Stronghold Companies, based in La Porte, Texas, is an industrial services provider that has been operational since 2009. With a workforce of over 1,300 employees, the company specializes in turnaround, capital projects, and maintenance services tailored for the refining and petrochemical industries. Their service portfolio includes bolting, field machining, tank construction, and various maintenance solutions. Stronghold's clients primarily consist of major players in the petrochemical sector, who rely on the company for efficient and safe project execution. The firm places a strong emphasis on skilled craftsmanship, investing in state-of-the-art equipment, and maintaining rigorous safety standards. Additionally, Stronghold operates Stronghold University, a training facility aimed at enhancing the skills of their workforce, ensuring that they remain competitive and capable in the demanding environment of petroleum refining.

14. B&E Resources, LLC

• Website: berltd.com
• Ownership type: Private
• Headquarters: Beaumont, Texas, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2004
• Headcount: 501-1000
• LinkedIn: b%26e-resources

B&E Resources, LLC, based in Beaumont, Texas, is an industrial services provider that has been operational since 2004. The company specializes in specialty fabrication solutions and offers a wide range of services, including capital projects, maintenance, and equipment installation. B&E Resources primarily serves clients in the refining, petrochemical, oilfield, and power generation industries. Their operations include the manufacturing of high-quality pipes, tanks, and drilling rigs, which are essential for ensuring operational efficiency in these sectors. With a workforce of approximately 287 employees, the company has established a reputation for delivering integrated industrial service solutions that support both planned upgrades and emergency services. B&E Resources is committed to maintaining high safety and quality standards, which are crucial in the demanding environments of the industries they serve.

15. TopTech

• Website: top-tech.pro
• Ownership type: Private
• Headquarters: Moscow, Moscow, Russia
• Employee distribution: Russia 100%
• Founded year: 2022
• Headcount: 11-50
• LinkedIn: toptechoilandgas

TopTech, founded in 2022 and based in Moscow, is a private engineering firm dedicated to the oil and gas industry. With a team of experts boasting extensive experience from prominent international companies, TopTech provides a variety of services tailored to the oil refining and petrochemical sectors. Their offerings include project design, technical support, catalyst supply, and training seminars aimed at enhancing operational efficiency and safety. The company is committed to delivering customized solutions that meet the specific needs of their clients, ensuring reliability and safety in the operation of catalytic systems and equipment. TopTech's focus on optimizing existing installations and supporting new projects positions them as a valuable player in the petroleum refining equipment installation space.

16. Fores Engineering

• Website: fores.it
• Ownership type: Private
• Headquarters: Forli, Emilia-Romagna, Italy
• Employee distribution: Italy 99%, Other 1%
• Founded year: 1992
• Headcount: 51-200
• LinkedIn: fores-engineering

Fores Engineering, established in 1992 and based in Forli, Emilia-Romagna, Italy, is a private engineering firm that specializes in providing integrated industrial solutions primarily for the oil and gas, petrochemical-refining, chemical, and energy sectors. With a workforce of approximately 192 employees, the company has built a reputation for delivering advanced technological solutions tailored to meet the needs of its clients. Fores Engineering offers a comprehensive range of services, including engineering, procurement, fabrication, and maintenance, which are essential for the installation and operation of petroleum refining equipment. Their projects span various geographical locations, with a strong presence in Italy and operational branches in Algeria and Kazakhstan. The company is part of the Rosetti Marino Group, which enhances its capabilities and market reach. Fores Engineering has successfully executed significant contracts, such as the maintenance of gas measurement systems for ENI S.p.A. and the engineering of chemical injection modules for offshore production systems, showcasing their expertise in the petroleum refining sector.

17. ISG S.p.A.

• Website: isgspa.com
• Ownership type: Family Owned
• Headquarters: United States (USA)
• Employee distribution: Italy 100%
• Founded year: 1951
• Headcount: 51-200
• LinkedIn: isgspa

ISG S.p.A. is an engineering firm based in Italy, established in 1951. The company specializes in process technology for the oil and gas industry, providing a range of services that include the design and supply of fluid treatment packages, engineering, procurement, and maintenance services. With a strong emphasis on high technology solutions, ISG caters primarily to clients in the oil and gas, refinery, and petrochemical sectors. Their expertise extends to handling both Engineering-Procurement-Fabrication (EPF) and Engineering-Procurement-Construction (EPC) projects. The company has successfully completed numerous projects worldwide, demonstrating their capability to manage complex installations and provide ongoing support through after-sales services. ISG's commitment to quality and safety is reflected in their adherence to ISO standards, ensuring that their operations meet rigorous industry requirements.

18. Electro-Mech Inc.

• Website: electromech.ms
• Ownership type: Private
• Headquarters: Richland, Mississippi, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1990
• Headcount: 11-50
• LinkedIn: electro-mech-inc-

Electro-Mech Inc. is a mechanical and electrical contractor based in Richland, Mississippi, with a focus on industrial construction. Founded in 1990, the company has built a reputation for providing specialized services such as piping installation, metal fabrication, and power distribution. They cater to various industries, prominently including petroleum refining and chemical production. With a workforce of 26 employees, Electro-Mech Inc. operates a 7,500 square foot fabrication shop equipped with advanced tools for welding and CNC plasma cutting. Their project portfolio spans several states, showcasing their capability to handle significant construction projects. The company holds multiple certifications and licenses across several states, further affirming their commitment to quality and compliance in the industrial sector.

19. Garrison Industrial Services

• Website: garrisonindustrial.com
• Ownership type: Private
• Headquarters: Gonzales, Louisiana, United States (USA)
• Founded year: 2005
• Headcount: 51-200
• LinkedIn: garrison-industrial-services

Garrison Industrial Services, founded in 2005 and based in Gonzales, Louisiana, is a private industrial services company. With a workforce of 51-200 employees, the firm specializes in electrical, civil, and soft-craft services, catering primarily to the oil refining and manufacturing sectors. Garrison prides itself on delivering high-quality workmanship and maintaining rigorous safety standards. Their clientele includes numerous Fortune 500 companies, indicating a strong reputation in the industry. Garrison's service offerings include electrical construction, instrumentation installation, concrete solutions, scaffolding, insulation, coatings, and fireproofing, all of which are critical in the petroleum refining process. The company emphasizes a disciplined approach, drawing on the military background of its founders to ensure strategic execution and high standards in all projects.

20. NDEC (Namavaran Delvar Engineering and Construction)

• Website: ndec.ir
• Ownership type: Private
• Headquarters: Tehran, Tehran, Iran
• Employee distribution: Iran 100%
• Founded year: 2004
• Headcount: 201-500
• LinkedIn: ndec-namavaran-delvar-engineering-and-construction-

Namavaran Delvar Engineering and Construction (NDEC) is a private project management consultancy based in Tehran, Iran, established in 2004. The company focuses on the oil, gas, and petrochemical industries, providing a comprehensive range of services that include project management, engineering consultancy, and construction supervision. NDEC has built a reputation for effectively managing complex projects from initiation to completion, particularly in the petrochemical sector. They have successfully handled significant projects such as ethylene, MEG, and ammonia-urea plants. Their expertise extends to both upstream and downstream operations, covering oil treatment facilities, gas refineries, and various petrochemical plants. NDEC's commitment to quality and safety is evident in their project management practices, which adhere to high standards. They have also been recognized for their contributions to the industry, receiving awards that highlight their excellence in project management. The company operates entirely within Iran, focusing on domestic and regional opportunities.

21. Hirgan Energy

• Website: hirganenergy.com
• Ownership type: Private
• Headquarters: Tehran, Tehran, Iran
• Employee distribution: Iran 100%
• Founded year: 2004
• Headcount: 51-200
• LinkedIn: hirgan-energy

Hirgan Energy Engineering Company, founded in 2004, is an engineering firm located in Tehran, Iran. The company specializes in the oil, gas, and petrochemical sectors, offering a range of services that include design, procurement, project management, and construction. Hirgan Energy has established itself as a key player in the energy sector, working on various projects that involve the installation and management of petroleum refining equipment. Their client base consists of businesses and organizations that require expert support in energy operations. The company is committed to quality and safety, adhering to international standards and certifications, including ISO 9001:2015 for quality management. Hirgan Energy's focus on continuous improvement and innovative solutions positions it as a relevant entity in the petroleum refining equipment installation market.

22. Ventech Engineers International LLC

• Website: ventech-eng.com
• Ownership type: Private
• Headquarters: Pasadena, Texas, United States (USA)
• Employee distribution: United States (USA) 66%, Philippines 34%
• Founded year: 1967
• Headcount: 501-1000
• LinkedIn: ventech-engineers-international-llc

Ventech Engineers International LLC, based in Pasadena, Texas, is an engineering and construction firm that specializes in the design and construction of modular refineries and gas processing systems. Established in 1967, the company has over 45 years of experience in the petroleum refining industry. Ventech provides a comprehensive suite of services, including feasibility studies, engineering and design, fabrication, procurement, logistics, construction management, and maintenance. Their fabrication facility spans 200,000 square feet and is strategically located just 1.5 miles from the Port of Houston, facilitating efficient project delivery. Ventech has a notable track record, having completed over 200 processing units and more than 30 successful plant relocations across various countries. Their innovative modular solutions allow for quick deployment and scalability, addressing the specific needs of clients in the refining sector.

23. Pyramid E&C

• Website: pyramidenc.com
• Ownership type: Private
• Headquarters: Houston, Texas, United States (USA)
• Employee distribution: India 80%, United States (USA) 13%, United Arab Emirates 5%, Other 1%
• Founded year: 1995
• Headcount: 201-500
• LinkedIn: pyramid-engineering-%26-consulting

Pyramid E&C, founded in 1995 and based in Houston, Texas, is a private hydrocarbon processing company that specializes in modular, digital, and sustainable solutions tailored for the oil and gas industry. With a workforce of approximately 136 employees, the company has established itself as a significant player in project development, engineering, and modular fabrication. Pyramid E&C's offerings include a variety of services such as EPC (Engineering, Procurement, and Construction) services, operation support, and decarbonization solutions. They have developed modular refineries capable of processing crude oil from 200 BPD to 50,000 BPD, producing a range of products including diesel, gasoline, and petrochemicals. Their innovative approach also extends to natural gas reforming and bioethanol production, showcasing their adaptability in a changing energy landscape. The company operates globally, with a significant portion of its workforce based in India, and has completed numerous projects across various markets, reinforcing its expertise in hydrocarbon processing.

Petroleum Refining Equipment Installation Insights: Key Companies

Company	Headquarter	Size	Founded	Ownership
Ohmstede, Ltd.	Beaumont, Texas, United States (USA)	501-1000	1905	Corporate
PetroForce	Tehran, Tehran, Iran	1001-5000	2011	Private
Richard Industrial Group	Beaumont, Texas, United States (USA)	1001-5000	2004	Private
Axens	Rueil-Malmaison, Île-De-France, France	1001-5000	2001	Private
Rototech Ltd - Energy & Industrial Projects	Acharnes, East Attica Regional Unit, Greece	51-200	2010	Private
Azar Energy Tabriz	Tabriz, East Azerbaijan, Iran	51-200	1988	Private
Polaris Engineering	Lake Charles, Louisiana, United States (USA)	51-200	1996	Private
RAMPCO Group	Tehran, Tehran, Iran	1001-5000	1992	Private
Richard	Beaumont, Texas, United States (USA)	1001-5000	2004	Private
Orion.Group	Kriukivshchyna, Kyiv Oblast, Ukraine	201-500	1995	Private
Namvaran Consulting Engineers, Managers	Tehran, Tehran, Iran	501-1000	1979	Private
Fateh Group	Cherryfield, Maine, United States (USA)	1001-5000	1989	Private
The Stronghold Companies	La Porte, Texas, United States (USA)	5001-10000	2009	Corporate
B&E Resources, LLC	Beaumont, Texas, United States (USA)	501-1000	2004	Private
TopTech	Moscow, Moscow, Russia	11-50	2022	Private
Fores Engineering	Forli, Emilia-Romagna, Italy	51-200	1992	Private
ISG S.p.A.	United States (USA)	51-200	1951	Family Owned
Electro-Mech Inc.	Richland, Mississippi, United States (USA)	11-50	1990	Private
Garrison Industrial Services	Gonzales, Louisiana, United States (USA)	51-200	2005	Private
NDEC (Namavaran Delvar Engineering and Construction)	Tehran, Tehran, Iran	201-500	2004	Private
Hirgan Energy	Tehran, Tehran, Iran	51-200	2004	Private
Ventech Engineers International LLC	Pasadena, Texas, United States (USA)	501-1000	1967	Private
Pyramid E&C	Houston, Texas, United States (USA)	201-500	1995	Private

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