Song Da 11 Thang Long One Member Co., Ltd. (SELCO SONG DA) is a member unit of Song Da Corporation, which has participated in the construction and installation of many important projects of the country on hydropower, high-voltage power transmission lines, water supply and drainage systems in urban and industrial areas...

Implementing the policy of restructuring and innovating enterprises, based on the functions, tasks, staff, assets, capital and construction equipment of Song Da 11.2 Enterprise and Song Da 11.5 Enterprise under Song Da 11 Joint Stock Company. The company was officially established on July 4, 2008 with the major of constructing and installing power transmission lines and transformer stations with voltage levels up to 500kV, constructing and installing electromechanical systems, water supply and drainage in high-rise buildings, urban areas, industrial parks and rural clean water, investing in hydropower projects, industrial park projects, urban areas new.

In recent years (2008 - 2013), with the efforts of the staff, the unit has successfully completed its production and business tasks with a total output value of 1,600 billion VND and a profit of 61 billion VND. The plan until 2015 and the orientation until 2020 of the Company is to become the key unit of Song Da Corporation in the field of investment in power source development, urban investment and industrial infrastructure, and continuously affirm its position as a strong EPC contractor in the field of construction and installation of electricity and water projects.