Site Security Manager - Nebius B.V. - London, United Kingdom

Nebius is looking for a Site Security Manager to lead physical security operations for the Nebius London office. You will own the day-to-day security posture of the site, protect employees, visitors, assets and infrastructure, and make sure local practices are robust, compliant and aligned with Nebius corporate standards. This is a hands-on leadership role for someone who can set clear processes, manage vendors and front-desk security personnel, and respond calmly and decisively when incidents occur. Your responsibilities will include: - Lead day-to-day physical security operations at the Nebius London office, maintaining a safe, secure and professional environment for employees, visitors and company assets. - Develop, implement and continuously improve site-specific security policies, procedures and training for the London office, aligned with Nebius corporate standards and applicable UK regulatory requirements. - Monitor and manage CCTV, alarm systems and access-control processes, ensuring reliable operation, clear escalation routes and timely response to potential threats. - Conduct regular risk assessments, site reviews and physical-security checks; identify vulnerabilities and drive corrective actions to completion. - Serve as the primary local liaison with UK law enforcement, emergency services, building management and other relevant authorities during incidents, emergencies or crises. - Lead investigations into security breaches and incidents, document findings clearly, and implement corrective and preventive actions. - Manage relationships with external security vendors and contractors, setting expectations and ensuring high-quality service delivery. - Direct, brief and coach front-desk security personnel on-site so that security standards are applied consistently and professionally. - Partner with Facilities, IT, People, Legal/Compliance and site leadership to keep local practices aligned with company-wide security, safety and business-continuity expectations. We expect you to have: - Proven experience managing physical security operations, preferably in large corporate, technology, critical-infrastructure or governmental environments. - Strong leadership, communication and interpersonal skills, with the ability to manage vendors, contractors and diverse on-site teams. - Solid knowledge of physical-security principles, risk management, emergency response and applicable UK regulatory requirements. - Hands-on experience with security technologies, including surveillance systems, CCTV, alarm systems and access-control platforms. - Excellent analytical and problem-solving ability, the judgment to assess risk, prioritize remediation and implement effective solutions. - Calm, credible decision-making under pressure, especially during emergencies, incidents or sensitive investigations. - Clear documentation and reporting skills, including incident reports, risk summaries, findings and corrective-action plans. - Good communication skills in English