ÇELİK YAPI was established in 2000 to give construction and contracting services with the leadership of M.Sc. Architect Yaşar MARULYALI and M.Sc. Architect Levent AKSÜT under the UMO GRUP as well as Dr. M.Sc. Civil Engineer İbrahim KORKUT.
The foundations of UMO GRUP date back to 1955 when UMO Architecture Engineering Contracting and Consulting Company was established which has completed many important national and international projects.
The division known as UMO TEKNİK, that was established to give project management services under UMO Architecture, started its services in 1993.
In 1979, USKON Space Frame Construction San. ve Tic. A.Ş. , which was established to manufacture and apply steel space frame system constructions and production, was started in the Gebze production facilities.
Since 1955, UMO GRUP companies have provided design, consultancy, project management, production, construction and contracting services to many structures with a total construction area of over 6,000,000 m² and continues to give service with a staff of about 200.