Preliminary Market Engagement – Sellafield Limited: Network Services

Sellafield Ltd is considering a call for competition for Network Services under the Network Services 4 (NS4) Framework Agreement (RM6377) Lot 1 Internet Connectivity Services (WAN), Lot 2 Local Connectivity Services (LAN), and Lot 3 Voice and Unified Communications. We anticipate launching this call for competition in July 2027. Sellafield Ltd is undertaking Preliminary Market Engagement to provide suppliers with an understanding of the Network Services opportunity and inviting feedback through a Request for Information (RFI), on key aspects of the requirement. The information gathered will help Sellafield Ltd assess market capability and capacity, validate and, where appropriate, refine its requirements, and inform its procurement strategy and approach. The proposed scope of the Network Services is as follows: External Connectivity The provision of circuit only connectivity from internal Sellafield networks to external networks and data centres including MPLS, DCI, internet, satellite and SIP connectivity. Corporate Data Services The provision of local, wireless, data centre networking and managed WAN overlay services supporting corporate, operational technology and business-critical applications across the Sellafield estate, including connectivity, routing, security, traffic management, application delivery and WAN management. Core Network Services The provision of shared network infrastructure services enabling secure and resilient operation of the Sellafield estate, including IP address allocation and management, network configuration, load balancing and time services. Network Security Services The provision of network-based access control, threat protection and gateway security services for users, devices, applications and internet connectivity across the Sellafield estate. Enterprise Telephony Services The provision of enterprise-wide voice communications services, encompassing, VoIP, analogue, contact centre and plant critical telephony alongside integrated v