The 240,000 sq ft fit-out of the 3 Arena Central built by Galliford Try encompasses the delivery of open-plan office accommodation, as well as meeting room suites and cellular offices.
There will also be works to a basement car park and new public amenity area.
Work is set to commence in November, with completion scheduled for autumn 2021.
This award follows ISG’s appointment to a similar scheme in Cardiff, also procured via the Government Hubs Fit-Out Framework programme.
Wayne Flannery, ISG’s Midlands regional director, said: “HMRC has an ambitious programme to future-proof its physical estate and optimise its office space to meet growing digitalisation demands.
“By adopting a framework procurement approach, HMRC has recognised the significant benefits of early contractor engagement and active collaboration to explore and implement the most efficient delivery programmes for these key regional hubs.
“Given the time and space to explore different delivery scenarios and programme approaches, ISG has developed a fast-track schedule, in partnership with our project stakeholders, that maximises efficiencies and community social value outcomes.”