Salary: £50,000 - 80,000 per year Requirements: Proven experience in cyber security governance, assurance, or security management in secure/regulated environments (e.g., UK Government or Critical National Infrastructure) Knowledge of NCSC guidance, Cyber Assessment Framework, and cyber security best practices Strong working knowledge of ISO/IEC 27001:2022, including experience achieving certification Familiarity with security risk frameworks and national security governance Experience delivering security controls across complex, multi-supplier programmes Strong analytical, communication, and stakeholder management skills Ability to interpret, implement, and assure compliance against detailed contractual security obligations SC clearance (mandatory) Eligibility for NPPV or DV (if applicable and required during time in post) UK residency requirements Responsibilities: Act as the security point of contact for government customers and security stakeholders Deliver and maintain the Security Management Plan processes to ensure contract-level compliance Lead the design, implementation, and maintenance of Etherstacks Information Security Management System in accordance with ISO/IEC 27001:2022 Conduct internal audit activity ensuring compliance to security requirements Manage continual improvement activity to enhance the ISMS and security posture Conduct root-cause analysis on security failures and implement mitigation plans Develop and deliver security awareness and training programmes Identify and assess emerging security threats Manage the remediation of vulnerabilities identified through third party testing activities Conduct risk assessments identifying suitable controls for mitigating risks Maintain oversight of in-life security delivery performance and compliance obligations Monitor third-party supplier adherence to contractual security requirements Support coordination across teams to meet client security objectives Technologies: Support Security Flow More: At Etherstack, we are a mission-critical communications company focused on delivering secure, resilient wireless technologies for government, defence, and public safety agencies globally. As we expand our operations in the UK and Europe, we are seeking an experienced Security Manager to enhance our governance and cyber-security capabilities. This role is vital for the protection of mission-critical communications that emergency services depend on. We offer benefits including private healthcare, pension contributions, company share options, flexible working conditions, and opportunities for growth in a mission-driven environment. Our office is located in London, providing a hybrid functional work model. last updated 14 week of 2026