Cahit Oklap

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.

Denkmal in Dahlem Otto-Hahn-Platz GmbH provides real estate brokerage services. The private company is based in Berlin, Germany. The CEOs are Cahit Oklap, Zsolt Farkas. The German company was founded in 2014.

Part of Tekfen Holding AS, Toros Tarim Sanayi ve Ticaret AS is a leading Turkish company in the agricultural industry, operating under the Toros Tarim brand. Based in Sisli, Turkey, Toros Tarim was founded in 1974 and is led by CEO Mehmet Nuri Sadikoglu. The company offers a wide range of services and activities related to agriculture.

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.