Architectural firm Purcell has been appointed to design part of the £850 million St James development.
The firm has been hired to work on the Mansion Capital building and St Andrews Hall.
The 1.7m sq ft St James scheme is one of the largest regeneration projects in the UK. It will see the 1970s shopping centre replaced with 1m sq ft of retail space, a five-star hotel, up to 250 new homes, restaurants and a digital theatre. Work is due to start next year.