Cyber Security Lead | £115,000 - £135,000 | London
Our client is a growing technology business developing an enterprise AI platform for the financial services market. They're looking for a Cyber Security Lead to take ownership of product, cloud and security assurance within a highly confidential, multi-tenant SaaS environment.

Key Responsibilities

Lead product and application security across the development lifecycle, including threat modelling, secure code review, vulnerability management and CI/CD security controls
Work closely with engineering and cloud teams to secure AWS environments, including IAM, network segmentation, encryption, logging and monitoring
Own security controls around identity, permissions, tenant isolation, audit trails and incident response
Lead security assurance activity covering SOC 2, ISO 27001 and wider customer security requirements
Support enterprise customer security reviews, questionnaires and due diligence while helping shape security standards across the organisation

Required Experience

7+ years' experience in cyber security or security engineering
Strong experience securing cloud-native SaaS platforms, ideally within AWS environments
Hands-on application security experience across threat modelling, OWASP and secure software development
Good understanding of cloud security, identity, access controls, encryption and monitoring
Experience delivering or implementing SOC 2 and/or ISO 27001 programmes
Experience supporting enterprise security reviews, questionnaires, audits or customer due diligence
Strong communication skills with the ability to work effectively with engineers, leadership and external stakeholders

Desirable

Experience securing AI, LLM or agentic applications
Knowledge of ISO 42001, EU AI Act or AI security risks
Financial services or other regulated industry experience
Experience with Kubernetes, infrastructure as code or wider cloud-native technologies

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.