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Site Security Manager (London)

Nebius
CompanyNebius
CategorySecurity
LocationLondon
RemoteOn-site (inferred)
EmploymentNot stated
LevelManager
SalaryNot stated by the employer
Posted20 Jul 2026
Last verified8 Aug 2026
SourceEmployer ATS (greenhouse)
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Description
About Nebius: Nebius is leading a new era in cloud infrastructure for the global AI economy. We are building a full-stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, without the cost and complexity of building large in-house AI/ML infrastructure. Built by engineers, for engineers. From large-scale GPU orchestration to inference optimization, we own the hard problems across compute, storage, networking and applied AI. Listed on Nasdaq (NBIS) and headquartered in Amsterdam, we have a global footprint with R&D hubs across Europe, the UK, North America and Israel. Our team of 1,500+ includes hundreds of engineers with deep expertise across hardware, software and AI R&D. The role 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. You’re welcome to work in our offices in London. 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, with the judgment to assess risk, prioritize remediation and implement effective solutions.