Osman Cengiz Birgili

Part of Tekfen Holding AS, HMB Hallesche Mitteldeutsche Bau-AG is a German company that specializes in financing, engineering, procurement, and construction. The company is based in Halle, Germany. The company offers a wide range of engineering and consultancy services, from conceptual design to tender documents, with a focus on areas such as petro-chemical and industrial plants, infrastructural works, ports and jetties, and mass-housing. Tekfen Engineering, the company's group company, was established in 1984 and is the first engineering and architectural firm to receive the ISO 9001 certificate. The company was founded in 1959, and the CEO is Cahit Oklap.

Part of Tekfen Holding AS, Tekfen Muhendislik AS is a digital solutions company based in Besiktas, Turkey. The Turkish company offers Model-Based Digital Systems Engineering services for industrial facility owners to aid in their digitalization journey. The company's services include design services, demand analysis, and feasibility studies. Tekfen Muhendislik has 36 years of experience in providing engineering services for their parent company, Tekfen Construction, as well as for leading industrial plants and transportation & infrastructure projects. The company has completed major projects such as the 1915 Çanakkale Bridge, Trans Anatolian Natural Gas Pipeline, and Baku Olympic Stadium Project.

TEKFEN Imalat ve Muhendislik AS specializes in engineering, manufacturing and construction of process and storage equipment. It offers storage equipment related with petroleum, petrochemical, chemical and fertilizer industries, power plants and storage terminals, such as cylindrical and spherical storage tanks, heat exchangers, pressure vessels, process columns and pressurized piping for industrial plants. The company was founded in 1970 and is headquartered in Istanbul, Turkey.

Tekfen Agri Industry Group produces fertilizer, seeds, seedlings and other agriculture products. The firm offers plant nutrition, seed, seedling and grain solutions. The company was founded in 1974 and is headquartered in Istanbul, Turkey.