The initial two-year deal covers design, engineering, planning and architectural services for the airport.

Morgan Sindall Professional Services will be responsible for delivering various multidisciplinary design projects with a capital value of up to £5m each.

The firm is expecting to work on up to 20 design projects each year.

James Chorley, Framework Manager at Morgan Sindall Professional Services, said: “We are well known in the aviation sector for our work at Heathrow and Gatwick as part of their respective framework agreements.

“But to win this new contract, and as a sole consultant, confirms our position as the genuine industry leader in delivering safe and sustainable design solutions to the aviation industry.”

Matt Allen, Head of Development and Construction at London Stansted, said: “There are ambitious plans to develop and improve London Stansted, which includes a project to transform the departure lounge inside the award winning terminal.

“We’re delighted to have Morgan Sindall on board with us; they have vast experience within the aviation industry and we look forward to working together to make Stansted even better in the months and years ahead.”