This project is an important milestone in the city’s waterfront master plan, which will see the redevelopment of a number of landmarks at prominent locations across the city.
The buildings will replace the existing Olympia Leisure Centre, and both will be built using steel frames.
As part of the contract Mansell will support pre-employment workshops for local people facing complex barriers to work.
Mansell has also pledged to provide taster sessions and health and safety workshops for schools and colleges and donate fundraising efforts to local organisations throughout construction.