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Head of Custody Security
London, United Kingdom
Security – Blockchain Security /
Full-time /
Hybrid
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Responsibilities
- Conduct, design, and implement testing of security controls covering identity management, key management, and infrastructure (network and cloud) configurations.
- Support client assurance activities, including responding to Requests for Proposals (RFPs), Requests for Information (RFIs), and Due Diligence Questionnaires (DDQs).
- Identify and analyze trends in client inquiries and provide feedback to internal teams to improve documentation and control readiness.
- Perform security due diligence and ongoing monitoring for Web3/blockchain vendors, including assessing their control maturity, reviewing SOC reports and security documentation, and identifying residual risks.
- Facilitate external audit activities, including coordination of walkthroughs, evidence collection, and response tracking.
- Identify and analyze gaps in current and new processes, then develop and track remediation recommendations to completion (e.g., onboarding flow).
- Develop and maintain understanding of applicable financial regulatory security requirements and ensure alignment of controls.
- Research and share information security best practices, emerging threats, and mitigation strategies with internal teams.
- Evaluate and propose next-generation security tools, automation, and technologies to enhance overall security posture.
- Review blockchain network or protocol upgrades for their potential security impact on the platform.
Requirements
- At least 8 years of relevant experience in security assurance, audit, compliance, or cloud security engineering.
- Demonstrated experience testing and validating security controls across IAM, key management, and network/cloud environments.
- Strong understanding of Identity and Access Management (IAM) principles.
- Knowledge of cryptographic key management, HSMs, and KMS systems.
- Solid grasp of cloud and network security architecture and configuration.
- Proven experience supporting SOC 1, SOC 2, ISO 27001, PCI DSS, or similar external audits and assessments.
- Exposure to major cloud platforms (AWS, GCP, Azure) and infrastructure-as-code.
- Experience in preparing client assurance materials, RFP/RFI/DDQ responses, and evidence documentation.
- Familiarity with blockchain platforms or digital asset custody systems is advantageous.
- Can work independently and under pressure.
- Excellent verbal and written communication skills
- Pragmatic and solution-oriented approach, ability to balance security requirements with operational feasibility and business needs.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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