Cyber Security Lead

Oscar Technology; City Of London; On-site; GBP 115,000 - 135,000; Full time

Job summary

Oscar Technology is seeking a Cyber Security Lead to take ownership of product, cloud and security assurance within a confidential, multi-tenant SaaS environment in London.

The role focuses on leading security across the development lifecycle, securing AWS environments, and coordinating security governance and customer due diligence. Salary is GBP115,000 to GBP135,000, with a strong emphasis on collaboration with engineering and leadership.

Qualifications

• 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.

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

Skills

Cyber security

Security engineering

Cloud security

Communication

Security leadership

Tools

AWS

IAM

Kubernetes

Job description

Cyber Security Lead GBP115,000 - GBP135,000 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