Tender: Supply of Public Key Infrastructure (PKI) Hardware Appliance for UK Ministry of Defence

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Unite Procurement UK Limited, on behalf of the Ministry of Defence, is seeking suppliers to join the Unite Procurement Platform to supply a Public Key Infrastructure (PKI) hardware appliance. The requirement covers a full PKI platform delivering Certificate Authority (CA), Registration Authority (RA) and Validation Authority (VA) functions, X.509 certificate issuance across classified and unclassified domains, support for enrolment protocols (SCEP, EST, ACME, CMP), Microsoft AD Certificate Auto Enrollment integration, and API-based integration (REST and web services). The hardware must be a secure, hardened rack-mount appliance with redundant SSDs and power supplies, ECC or equivalent memory, and defence-grade hardening and assurance; the solution must support multi-node geographically distributed resilience, real-time replication and clustering, scalable certificate capacity (minimum 2,500 with growth to millions), a web-based admin interface for restricted environments, full audit logs and compliance reporting, secure updates, and backup/disaster recovery aligned with MOD security policies and Zero Trust initiatives. Contract scope includes supply of appliances, PKI platform licensing, HSM capability, implementation, integration and configuration, plus ongoing support and maintenance; interested suppliers should register their interest with Unite Procurement UK Limited and provide product range, modification capabilities and maintenance services.