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Join Vodafone Business Security Enhanced and strengthen the cyber security of the UK's Critical National Infrastructure and public sector organisations. As the PKI Defence Lead, you will be the authority guiding the design, implementation, and ongoing assurance of secure Public Key Infrastructure within classified and mission critical environments. Your work will underpin cryptographic integrity, identity assurance, and secure communications across systems that protect national interests. This is a role for someone who thrives in high stakes security contexts and is ready to lead the evolution of PKI capabilities across a complex, multi partner ecosystem.
Job Responsibility:
Develop and maintain PKI architectures aligned with security standards for sensitive and regulated environments including designing certificate hierarchies, trust models, and key management strategies
Deploy and manage Certificate Authorities (CAs), Registration Authorities (RAs), and associated infrastructure, and oversee lifecycle management of digital certificates and cryptographic keys
Ensure PKI systems comply with relevant governmental, international and other applicable regulatory requirements, and conduct audits, risk assessments, and vulnerability analysis of PKI components
Integrate PKI with identity and access management (IdAM), secure email, VPNs, and authentication systems, and provide expert support for incident response involving cryptographic systems
Collaborate with internal teams, clients, and external vendors to ensure secure and interoperable PKI solutions and provide training and guidance to technical teams and end-users
Requirements:
Proven experience in PKI design and operations within government, public sector, or critical national infrastructure
Current DV clearance or eligibility and willingness to undergo DV vetting
Deep understanding of cryptographic protocols (X.509, OCSP, SCEP, CMP, etc.)
Familiarity with HSMs, smart cards, TPMs, and secure enclaves
Experience with tools such as Microsoft AD CS, EJBCA, OpenSSL, and Venafi
Strong knowledge of cybersecurity frameworks (e.g., NIST 800-53, ISO 27001, CIS Controls)
Successful implementation and maintenance of secure PKI systems
Ensure compliance with relevant international and organisational regulations
Maintaining continuous assurance, auditing and monitoring activities
Ability to work within secure environments and handle sensitive data securely
What we offer:
Great pay, bonuses, up to 28 days off plus bank holidays, and paid time for charity work
Discounts, vouchers, a pension plan and loads more
Amazing learning tools and top-notch parental leave policies