Platform Architect Agentic Security

Platform Architect Agentic Security (Belfast, Hybrid) New Company to NIAt a GlancePrincipal level architecture role defining the reference architecture for a major new AI trust and identity platformDeep specialism in cryptography, PKI, HSMs, workload identity and delegated authorisationHybrid role based from a new Belfast engineering site, with global reach and influenceRare opportunity to help shape industry standards for agentic AI trust and securityCompetitive salary, disclosed on applicationAbout the CompanyOur client is a well established, global provider of digital security and identity technology , serving regulated enterprises across sectors including financial services, government and critical infrastructure. They are building a new agentic trust and identity platform that brings together decades of cryptography and identity expertise to underpin secure, accountable AI driven decision making. This is a strategically important initiative, and the business is investing in a new Belfast engineering site to support it.The RoleAs Platform Architect, you will define and govern the reference architecture underpinning a major new identity, authorisation and assurance platform designed to make AI driven decision making secure, verifiable and accountable. You will work across a four layer architecture spanning identity, authority, execution and assurance, ensuring multiple product teams operate within a single, coherent architecture and governance model. This is a senior, highly technical role with genuine influence: you will act as design authority and technical gate across the platform, represent the business in relevant industry standards discussions, and partner closely with executive, product, security and engineering leadership. It suits an experienced architect who wants to help shape how an entire industry approaches trust and security for autonomous AI systems.Key ResponsibilitiesDefine and own the reference architecture spanning identity, authority, execution and assurance for a new agentic trust platformEstablish architectural principles, standards and governance processes across multiple product teamsOwn the technical specification for workload identity, and credential issuance and rotation, using standards such as SPIFFE/SPIREOwn the design of a cryptographically signed delegation and authorisation framework, including HSM backed signing and revocationOwn the design of a tamper evident, independently verifiable evidence and audit system for AI driven decisionsServe as design authority and technical gate across all builds on the platform, arbitrating scope and architecture conflictsGuide investment decisions on cloud platforms, cryptographic infrastructure and confidential computingRepresent the business in relevant industry standards bodies, converting emerging standards into product architecturePartner with executive leadership, product and security teams to align technology investment with business strategyLead, mentor and develop architects and senior engineers across the platformWhat You'll NeedEssential:Bachelor's degree in Computer Science, Engineering or a related field15+ years' progressive technology leadership experience7+ years leading enterprise architecture or platform/security architecture for identity, cryptography or trust infrastructure productsDeep, applied expertise in cryptography and PKI: certificate authorities, key lifecycle and custody, HSMs, signing services and hardware roots of trustWorking expertise in workload identity (SPIFFE/SPIRE, SVIDs, mutual TLS) and modern delegated authorisation (OAuth 2.x, token exchange, PBAC/ABAC)Experience designing tamper evident or append-only verifiable systems, for example Merkle backed logs, Certificate Transparency, or equivalentDeep expertise in at least one major cloud platform (Azure, AWS or GCP), including confidential computing and customer managed key managementExperience shipping products under third party assurance regimes such as FIPS 140-3, Common Criteria, eIDAS, SOC 2 or FedRAMPProven ability to influence executive stakeholders and lead cross-functional teams in complex global organisationsDesirable / Nice to Have:Experience deploying and securing Generative AI or LLM solutions at enterprise scaleKnowledge of agentic AI architectures, AI orchestration frameworks, MCP, or agent-to-agent interoperability standardsExperience in highly regulated industries such as financial services or insuranceWhy Apply?Competitive salary, disclosed on applicationGenuine influence over the architecture of a major new AI trust and identity platformRepresent the business in shaping emerging global standards for agentic AI trustHybrid working from a new Belfast engineering siteBacking of a well resourced, global digital security and identity technology businessHigh impact, strategically important initiative with genuine influence at the top tableStrong autonomy and a genuine design-authority mandateGenerous annual leave and pensionNext StepsGet in touch with Phil Gamble at or via Linkedin/Whatsapp to find out more or submit your CV, in complete confidence.