Project and contract managers should use in-house support where possible. External advisers should only be appointed when the appropriate expertise is not available in-house. The external advisers during the procurement phase should be required to ensure a transfer of skills and knowledge to the in-house facility upon contract signature one of the requirements of the original assignment. Where possible, the procurement advisers should be re-engaged if external support is required, with the terms of such ad-hoc advice having been agreed as part of the original adviser procurement.