Gülermak has been playing a major role in the construction industry at both domestic and international markets since its establishment in 1958. Today, Gülermak is a leader in rail system projects, infrastructure projects and industrial projects with her deeply rooted corporate culture and highly experienced staff. As a leading turnkey rail systems contractor, Gülermak has been involved in more than 175 km of underground tunnels and 80 numbers of underground stations in its turnkey contracts.some of its ongoing rail system projects are ?stanbul Mecidiyeköy–Mahmutbey Metro, Sabiha Gökçen Kaynarca Metro, Dubai Metro Expo 2020, Warsaw Metro Line II Phase II, Lucknow Metro, ?zmir Tramway, Kocaeli Tramway, Rehabilitation of Samsun-Kal?n Railway, Reconstruction of Sincan-Kaya? Railway.