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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # PKI Security Engineer/CLM Implementation Engineer - **Company:** Harvey Nash - **Location:** London, UK - **Salary:** £156,000.0 - £182,000.0 - **Contract:** Temporary contract - **Skills:** Java (Programming Language), Microsoft Windows, Active Directory, Application Programming Interfaces (APIs), Amazon Web Services, Proxy Servers, Apache HTTP Server, Microsoft Azure, Bash Shell, Cloud Computing, Databases, Continuous Integration, Data Recovery, Linux, DevOps, Disaster Recovery, Web Servers, Internet Information Services (IIS), Networking Hardware, JSON, Python (Programming Language), Linux System Administration, Linux Servers, Windows Servers, Nginx, OAuth, OpenSSL, Public Key Infrastructure, X.509, Windows PowerShell, Role-Based Access Control, Cloud Services, Migration Manager, Ansible, Runbook, Sherwood Applied Business Security Architecture, SQL Databases, Systems Integration, Data Logging, Enterprise Software Applications, Load Balancing, System Availability, Delivery Pipeline, Firewalls (Computer Science), Git, Git Flow, Kubernetes, Restful APIs, Terraform, Software Version Control - **Published:** November 7, 2026 - **Apply:** https://www.careerboard.com/gb/en/find-jobs-in-United-Kingdom/-0368E6870CFE123A08/ ## About the Role * Senior PKI/CLM engineer with substantial hands-on implementation experience in complex enterprise environments, not only BAU certificate administration. * Proven delivery of an enterprise CLM platform across multiple business units, legal entities or regions, including discovery, pilot, rollout, integration & operational transition. * Strong knowledge of PKI architecture and operations: root and issuing CAs, Microsoft AD CS, certificate templates, enrollment, CRL, OCSP, AIA/CDP, trust chains, key protection and HSM integration. * Hands-on experience automating the X.509 certificate life cycle across Windows, Linux, network, cloud, container, Kubernetes, application & DevOps environments. * Experience integrating CLM through ACME, SCEP, EST, REST APIs, agents, connectors and CI/CD tooling. * Working knowledge of cryptographic discovery, inventory, crypto-agility, CBOM concepts and risk-based migration planning for PQC. * Experience in regulated financial-services or similarly controlled environments with strong audit, risk, change, resilience and segregation-of-duties requirements. * Ability to coordinate technical delivery across entities, suppliers, application owners, infrastructure teams & security governance stakeholders. Core PKI and CLM Technical Skills (Essential) * Enterprise CLM implementation and administration: discovery, inventory, ownership, policy, enrollment, deployment, renewal, revocation and reporting. * Microsoft Active Directory Certificate Services (AD CS), enterprise CA hierarchy, certificate templates, auto-enrollment and CA security. * X.509, TLS/mTLS, certificate chains, CSR, SAN, EKU, key usage, CRL, OCSP, AIA/CDP, PKCS standards and PEM/PFX/JKS/key stores. * CLM product experience with at least one leading platform such as Keyfactor Command, DigiCert Trust Lifecycle Manager, Venafi TLS Protect, AppViewX or equivalent. * Public and private CA integration; HSM and key-management integration; secure key generation, storage, backup & recovery. * Certificate deployment across IIS, Apache, NGINX, Java, databases, load balancers, Firewalls, proxies, network appliances and enterprise applications. * ACME, SCEP, EST, REST API & agent/connector-based certificate automation. * Operational monitoring, expiry alerting, service resilience, troubleshooting, audit evidence & life cycle reporting. Infra & Cloud Skills * Active Directory, Entra ID, Windows Server and Group Policy. * Linux administration and OpenSSL/key-store troubleshooting. * Azure, AWS & GCP certificate and key-management services. * Kubernetes, containers, ingress controllers, service identities and cert-manager or equivalent. * DevOps and CI/CD integration, including Git-based workflows, pipelines, APIs and secrets handling. * Network and application platforms such as load balancers, reverse proxies, Firewalls, web Servers and databases. * HSMs, KMS, secrets-management platforms & privileged access controls. * High availability, disaster recovery, monitoring, logging & IT service-management integration. Qualifications * Essential or strongly preferred: relevant vendor implementation certification for the selected CLM platform, such as Keyfactor, DigiCert, Venafi or AppViewX administration/engineering certification. * Highly desirable: Microsoft Windows Server Hybrid Administrator or equivalent demonstrable AD CS expertise. * Highly desirable: CISSP, CCSP, CISM, SABSA or equivalent security/architecture qualification. * Desirable: cloud certification in Azure, AWS or GCP. * Desirable: Kubernetes certification such as CKA or CKS, where container certificate automation is in scope. * Desirable: PKI, HSM or cryptography-focused professional training/certification. * PQC-specific formal certification is not mandatory; practical knowledge of NIST PQC standards, crypto-agility, discovery and migration planning is required. Automation & Integration Skills (Highly Desired) * PowerShell, Python and Bash Scripting. * REST APIs, JSON, OAuth/service authentication & secure automation patterns. * Infrastructure as Code and configuration automation, such as Terraform, Ansible etc * CI/CD platforms & Git-based source control. * SQL/reporting & data analysis for certificate inventory, ownership & risk tracking. Key behaviours/competencies * Hands-on delivery focus with the ability to move from architecture and design into implementation & troubleshooting. * Proactive, risk-based & security-focused approach. * Strong stakeholder management across EMEA entities & cross-region teams. * Ability to translate technical PKI, certificate and PQC risks into clear business impact and remediation priorities. * Strong written and verbal communication, including technical workshops and senior stakeholder updates. * Good planning, prioritisation and dependency management across multiple onboarding waves. * High-quality technical documentation and knowledge transfer. ## Description looking for a highly experienced PKI Security Engineer to lead the design, implementation and phased rollout of a Certificate Lifecycle Management (CLM) platform across EMEA. This will establish automated certificate discovery and life cycle controls, integrate the platform with enterprise PKI and technology services, and progressively support post-quantum cryptography (PQC) risk assessment and remediation over the next 1-3 years. What will this person be doing? * Lead the end-to-end implementation and phased rollout of the selected CLM platform across EMEA, from design & pilot through production deployment & operational handover. * Create & maintain a central inventory of certificates, keys, trust stores, issuing CAs, owners, dependencies, environments and associated business services. * Integrate CLM with Microsoft AD CS, approved public CAs, HSMs, load balancers, network devices, Windows and Linux Servers, cloud services, containers, Kubernetes, DevOps pipelines and enterprise applications. * Automate certificate request, approval, issuance, deployment, renewal, revocation and decommissioning using ACME, SCEP, EST, APIs, agents and native connectors where appropriate. * Design CLM architecture, trust boundaries, RBAC, service accounts, resilient components, security controls & operating processes aligned with our standards and change governance. * Plan discovery and onboarding waves with application, infrastructure and entity stakeholders; identify certificate ownership & remediate orphaned, expired, weak or manually managed certificates. * Define monitoring, alerting, dashboards, audit evidence, KPIs/KRIs and integration with security monitoring and IT service-management processes. * Perform technical evaluation, testing and troubleshooting of CLM capabilities, connectors and integrations, including production-readiness and scalability assurance. * Support cryptographic discovery and inventory for PQC, identify quantum-vulnerable algorithms and dependencies, maintain a risk-based remediation backlog and help develop migration plans over the next 1-3 years. * Assess vendor and product crypto-agility, certificate and protocol dependencies, and readiness for NIST-standardised PQC algorithms & hybrid transition patterns. * Produce & maintain HLD, LLD, runbooks, support procedures, standards, onboarding patterns, knowledge articles and operational handover documentation. * Provide PKI/CLM SME guidance to application, infrastructure, cloud, DevOps, security, risk, audit & entity teams across EMEA.