Orissa Construction Corporation Ltd is a first Public Sector Construction Company of Orissa. It is Major participant in all multipurpose river valley projects, bridges, harbors, thermal power stations, industry and railway projects, Leading construction consultant of Orissa, Pioneer software development and ITES company of Orissa.

Pipavav Railway Corporation Ltd. (PRCL) is the 50:50 Joint Venture Company of Indian Railways and the Gujarat Pipavav Port Ltd (GPPL), set up to construct, maintain and operate 271 kilometers long broad gauge railway line connecting Port of Pipavav to Surendranagar Junction of Western Railway, in the state of Gujarat. PRCL is the first infrastructure modal of Public - Private Partnership in rail transportation. PRCL enjoys the status of a Railway Administration, under Railway Act, 1989.

Railtech was established in the year 1990, with the main objective to manufacture/supply components to the Indian Railways. Railtech was established in the year 1990, with the main objective to manufacture/supply components to the Indian Railways. RailTech Group companies over the years have become synonyms with quality rail components. From early designs, to the revolutionary new line of products, the group companies have always led the industry with innovations withstanding the challenging tests of time and along with constant R&D efforts, have been striving towards enhancing the performance of its products under all possible conditions. The group continues to lead the way with innovative design enhancements for railway components in a demanding and competitive environment. RailTech employs professionals and highly motivated employees, who have been jointly operating as an extremely effective team. Our highly skilled personnel are actively involved with the design and study committees of various government and non-government organizations for the advancements of Railway infrastructure and facilities in the country.

Stone India is a multi-product engineering company located in Kolkata and serving the Indian rail road industry for over seven decades. A pioneer in brake systems and train lighting alternators, today Stone India is the undisputed leader in locomotive brake systems and has a wide range of mechanical and electrical products for the rail road industry. The Carriage Business Group deals with pneumatic Brake Systems for Carriage & Freight stock for Railway rolling stock operation. The Locomotive Business Group deals with Locomotive Brake Systems for Diesel and Electric Locomotives. The Train Power Business Group deals with Electro Mechanical, Electrical & Electronic products used in Indian Railways.

Trenchless Engineering Services Private Limited Engaged in offering construction services like drilling, installing and boring of pipelines under railway line, roads, canals and rivers.

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