The partners will assist HS2 in the completion of the appraisal of sustainability for routes north from the West Midlands to Manchester and Leeds.
This involves supporting the route consultation process, undertaking environmental appraisals of scheme refinements and final scheme selection.
Beth West, HS2 commercial director said: “HS2 is one of the most ambitious infrastructure projects ever undertaken in the UK and it will give a significant boost to the engineering and environmental sectors through developing the expertise needed to work on such large projects.
“This contract award is a positive sign of the progress that continues to be made on phase two beyond Birmingham as we move toward the public consultation later in the summer on the initial preferred route that was published at the end of January.”
It is the fourth contract that has been awarded under the phase two framework agreement.