Head of Proactive Security (Cybersecurity)

Location: Tel Aviv, Israel

Company

Nebius builds a full-stack AI cloud platform for data processing, model training, and production deployment, with infrastructure spanning compute, storage, networking, and applied AI.

What you will do

• Define the proactive security strategy, operating model, roadmap, budget, priorities, and success measures.
• Build and lead Red Team, Penetration Testing, Threat Hunting, and Threat Intelligence teams.
• Lead intelligence-led adversary simulations across cloud, identity, applications, infrastructure, endpoints, networks, and operational processes.
• Own risk-based penetration testing and continuous security validation for products, APIs, cloud environments, infrastructure, and critical systems.
• Establish threat-hunting and threat-intelligence programs that support detection, investigation, testing, and incident readiness.
• Convert proactive-security findings into prioritized remediation actions and measurable improvements in resilience and control coverage.

Requirements

• Extensive cybersecurity experience with leadership responsibility in offensive security, penetration testing, threat hunting, threat intelligence, detection engineering, or incident response.
• Experience building or scaling multidisciplinary security teams and programs, including budgets, vendors, and external testing providers.
• Strong technical understanding of cloud environments, identity systems, applications, APIs, networks, endpoints, containers, and production infrastructure.
• Experience delivering red-team operations, penetration tests, or adversary-emulation exercises.
• Practical knowledge of threat-hunting methodology, telemetry, detection logic, investigation workflows, and MITRE ATT&CK.
• Applicants must be authorized to work in the country in which they apply and provide proof of employment eligibility.

Nice to have

• Experience in cloud, hyperscale, AI, or highly distributed technology environments.
• Relevant certifications, deep domain expertise, responsible research experience, or industry collaboration.

Culture & Benefits

• Competitive compensation and career growth opportunities.
• Learning opportunities, flexibility, and ownership.
• Collaborative, innovative, and international work environment.
• Opportunity to contribute to impactful AI projects.