In what will be the most comprehensive redevelopment of the Victorian building since it opened in 1878, the theatre will close in the summer and re-open in late 2020 with works due to commence on site in September.

Commenting on the appointment of Kier, Judith Kilvington, executive director of Citizens Theatre, said: “This appointment marks the next phase in our Redevelopment Project. Kier has a wealth of experience in delivering theatre and heritage projects and it’s hugely exciting to be welcoming them to the team, led by architects Bennetts Associates, to realise our vision for the Citizens Theatre.

“Kier will work alongside Citizens Theatre and our Design Team in achieving the Second Stage tender and will then go on to carry out the required building work to overhaul our Victorian home – alongside overseeing the demolition of our foyer and back offices to make way for a new wing, including a new studio theatre and learning spaces.

“Our new building has been redesigned to create level access for staff, participants and audiences members. When we re-open to the public they will easily be able to visit and view some of the best examples of theatre heritage in Europe.”

Brian McQuade, Kier Construction Scotland and North East managing director, said: “We’re delighted to restore, improve and protect the iconic Citizens Theatre. This builds on our solid record of working on major heritage projects, including The Mackintosh Building at Glasgow School of Art, Edinburgh College of Art, Aberdeen Music Hall and most recently, The Burrell Collection.

“As with all the work we carry out, we will provide jobs for the local community by working with our supply chain to offer a range of diverse employment and training opportunities throughout this exciting project. “

The Category B listed building is owned by Glasgow City Council and leased to the Citizens Theatre Company for more than 70 years.

Over the next two years the company will produce shows and provide learning activity at Tramway, Scotland Street School Museum and other venues throughout Scotland and beyond.

The company has already successfully secured £17.8m in pledges towards the redevelopment project from Creative Scotland, Glasgow City Council, Heritage Lottery Fund, Scottish Government (Culture Budget, Regeneration Capital Grant Fund and Historic Environment Scotland), The Robertson Trust and a variety of other trusts and individuals. The theatre’s ‘We Are Citizens’ public fundraising campaign is inspiring, engaging, and encouraging others to help raise £1.6m for the building redevelopment.

The redevelopment project management team includes: