Extensions & Refurbishment. The project was delivered for Investec Bank Limited, with SIP Project Managers (Pty) Ltd as Principal Agent, John Radford Architects (Pty) Ltd as Architect, and Brian Heineberg and Associates (Pty) Ltd as Quantity Surveyor. Mechanical / Electrical Engineer: Adaptive Resource Engineers / Aftek Consulting. Structural Engineer: Aurecon South Africa (Pty) Ltd.