The Technical Design Authority (TDA) works with Project Teams within Service Delivery on Technical Architecture issues and is a key enabler for Defence Digital in taking ownership of the design, management and orchestration of an increasingly disaggregated, multi-vendor ICT services estate - as well as a critical element of the Defence Digital Service Integration and Management (SIAM) capability. In support of delivering and maintaining this capability, this contract will provide TDA Co-ordination and Risk Management Services.;