Senior AI Security Technologist

Barclay Simpson; Greater London, Reading; Hybrid; GBP 85,000 - 125,000; Full time

Job summary

Barclay Simpson seeks an exceptional hands-on security technologist/architect to shape how the company securely adopts AI and Agentic AI. You will work with architects, developers and engineering teams to secure AI platforms from design through deployment, creating reusable security patterns and challenging designs.

The ideal candidate has a strong security architecture background with application security and AI/LLM security architecture experience, and practical exposure to Vertex AI/Gemini,

Qualifications

• Strong security architecture background with application security and AI/LLM security experience.
• Hands-on security expertise across design, deployment and patterns.
• Experience with major AI platforms (Vertex AI/Gemini, AWS Bedrock, Azure OpenAI, Claude, OpenAI).

Responsibilities

• Secure AI platforms and solutions from design through deployment.
• Create reusable security patterns and evaluate designs.
• Tackle emerging risks across LLMs, RAG and autonomous/agentic systems.
• Explore how AI can enhance and automate cyber security capabilities.

Skills

Security architecture

Application security

AI/LLM security

Hands-on security

Tools

GCP Vertex AI

Gemini

AWS Bedrock

Azure OpenAI

Claude

OpenAI

Job description

This international commercial organisation seeks an exceptional hands-on security technologist/architect to help shape how the company securely adopts AI and Agentic AI.

You'll work directly with architects, developers and engineering teams to secure AI platforms and solutions from design through deployment, creating reusable security patterns, challenging designs and tackling emerging risks across LLMs, RAG and autonomous/agentic systems. You'll also explore how AI itself can be used to enhance and automate cyber security capabilities.

The ideal candidate will have a strong security architecture background with application security and AI/LLM security architecture experience. Practical exposure to platforms such as GCP Vertex AI/Gemini, AWS Bedrock, Azure OpenAI, Claude or OpenAI is essential.

This is a rare opportunity for someone who wants to remain technically hands-on while becoming a recognised industry leader in AI security.

This role is offered as hybrid in either Reading or Central London.