Gulermak Agir Sanayi Insaat ve Taahhut AS engages in the construction, maintenance, and repair of railways and subways. The firm is also involved in transportation, industry, power, and environment fields of activity. Its projects include Konya-Karaman High Speed Railway, Bucharest International Airport Rail Access Link Project, Cluj Metro Line 1, Kargi Hydropower Plant, and Aksaray Sugar Factory. The company was founded in 1958 and is headquartered in Gölbasi, Turkey.