The £10m contract is the second to be awarded under HS2’s civil and structural design services framework.
Arup will be supported by architectural firm Grimshaw and Costain which will plug in its logistics expertise.
The redevelopment will create a new terminus for HS2 and existing railway services plus a new London underground ticket office.
There will also be the opportunity for new public spaces and community facilities to be created above more spacious platforms and the streets surrounding the station will be easier to access.
Alison Munro, Chief Executive of HS2 Ltd, said that the Euston station terminus was a key part of the project.
“Our long term vision for Euston Station is to provide the principal rail gateway for high speed rail services from London to the West Midlands, and onto the north-west and north-east of England and Scotland.
“Following a comprehensive selection process, we have awarded this contract to Arup, supported by Grimshaw and Costain, for their innovative approaches towards engineering, architectural design and construction logistics.
“Rebuilding Euston will inevitably cause significant disruption but we are committed to working closely with the London Borough of Camden and the GLA with the intention of agreeing a joint strategy for the Euston area and providing new social housing to replace any that is compulsorily purchased.”
This work will form part of the hybrid bill documentation, to be deposited by the end of 2013.
HS2 Ltd will work closely with Network Rail and TfL to maintain the required levels of peak and off-peak train services and to provide valuable opportunities to improve access to the tube network.