The tender is due to be floated on 28 July and the deadline for bids is set for 15 September. The contract is expected to be awarded in the first quarter of 2014.
The contract covers phase one of the Doha metro project, which covers 130 kilometres of metro line and 49 stations and includes the planned Red Line North, Red Line South, Gold Line, Green Line and an operational link between Red Line South and Gold line.
A total of QR30bn-worth ($11bn) civil works contracts were awarded for the first phase of Doha metro in May. Bids for the Golden Line are still under evaluation.
A shortlist of companies to provide the systems, rolling stock and track work has already been drawn up, with the award expected to be made in the second quarter of 2014.