Arup is to develop detailed designs for two visitor facilities at the Forth Bridge.
The consultant was appointed by Network Rail to take forward plans for a visitor centre, lift and viewing platform in North Queensferry.
Arup will also work on proposals for a smaller hub for bridge walkers at the other end of the structure, in South Queensferry.
The deal will see build-ready designs delivered by the middle of next year, before a planning application is submitted.
WT Architecture will provide architectural advice and local knowledge while the Paul Hogarth Company will help develop hard and soft landscaping.
Network Rail route managing director David Dickson said: “This is a significant investment in our vision for a groundbreaking tourist attraction for Scotland.
“It demonstrates our commitment to further developing our visitor proposals during the Forth Bridge’s 125th anniversary year.
“Arup’s bid stood out for a number of reasons, not least due to the involvement of local firms which will help form a strong core for the design team.”
See Network Rail’s plans for the Forth Bridge visitor attraction below.