Overview
We are seeking an experienced Security Purple Team Lead to support a leading financial services organisation in enhancing its advanced threat defence capability. This contract role will focus on driving collaboration between Red and Blue teams, executing adversary simulation exercises, and improving detection and response effectiveness across a complex, regulated environment. The role will also play a key part in integrating AI-driven security techniques into threat detection, hunting, and response strategies. Key Responsibilities
Lead and deliver Purple Team engagements, aligning offensive and defensive security capabilities
Design and execute adversary simulation exercises mapped to MITRE ATT&CK
Translate Red Team findings into enhanced detection use cases, controls, and playbooks
Partner with SOC, Threat Intelligence, and Incident Response teams to improve detection and response maturity
Develop and optimise SIEM/XDR detection rules and threat hunting capabilities
Apply AI/ML techniques to improve threat detection, anomaly identification, and response automation
Provide expertise in securing AI/LLM environments, including identifying emerging risks such as prompt injection and model abuse
Deliver clear reporting and metrics to demonstrate improvements in security posture
Support regulatory, audit, and risk requirements within a financial services context
Mentor internal teams and uplift Purple Team capability Key Skills & Experience
Proven experience in a Purple Team, Red Team, or advanced Blue Team role within enterprise environments
Strong knowledge of MITRE ATT&CK, adversary simulation, and detection engineering
Hands-on experience with SIEM and EDR/XDR platforms such as Splunk, Microsoft Sentinel, or Elastic
Experience in threat hunting, incident response, and security operations
Exposure to cloud security across AWS, Azure, or GCP AI & Emerging Technology Experience (Desirable)
Practical experience applying AI/ML in cybersecurity, including behavioural analytics and anomaly detection
Understanding of AI/LLM security risks and appropriate controls
Experience with AI-assisted SOC or security tooling Domain Experience
Strong background within banking or financial services
Understanding of regulatory frameworks, operational resilience, and risk management
Experience working in highly regulated, complex environments Certifications
Relevant certifications such as OSCP, Crest, GIAC, CISSP or equivalent experience Key Deliverables
Successful execution of Purple Team exercises with measurable improvements in detection coverage
Enhanced threat detection use cases and response playbooks
Improved SOC effectiveness and threat hunting capability
Clear reporting and metrics demonstrating security uplift
Integration of AI-driven approaches into security operations Why This Role
Opportunity to work on a cutting-edge Purple Team programme within a Tier 1 financial environment
Exposure to AI-driven cybersecurity innovation
High-impact role with visibility across security leadership and engineering teams
Immediate start on a critical security transformation initiative  | 
