Five companies shortlisted to build 225mph trains for HS2 will be revealed on Thursday. HS2 Ltd will name the firms bidding to win the £2.75 billion contract.
Transport Secretary Chris Grayling said he was determined the deal would "create huge opportunities for British workers".
He went on:
Mr Grayling added it was "crucial that the benefits of HS2 resonate far beyond the opening of the new railway". The contract is expected to be awarded in late 2019.
Phase 1 of the £55.7 billion high-speed railway will open between London and Birmingham in December 2026, with a second Y-shaped phase launching in two stages.
Phase 2a from the West Midlands to Crewe will begin in 2027, followed by Phase 2b from Crewe to Manchester, and Birmingham to Leeds, in 2033.
Existing orders mean thousands of new train carriages are already due to roll off UK production lines over coming years.
Hitachi's manufacturing plant in Newton Aycliffe, County Durham, is building more than 100 Intercity Express trains for the Great Western and East Coast lines over the next three years.
Earlier this year Derby's Bombardier secured a multi-million pound investment to build 90 new trains for South Western Railway services.