Security Analyst - Tier 3

Your responsibilities will include: Lead complex, multi-stage, multi-domain investigations end to end, from scoping through deep technical analysis to a clear determination of impact and root cause. Serve as the SOC's senior escalation point and the quality gate for investigations across the team. Support the Incident Response team during confirmed incidents with continued telemetry investigation, scoping, and analytical depth. Continuously sharpen how the SOC investigates, identifying gaps in methods, runbooks, and tooling through daily casework and turning them into concrete improvements. Mentor Tier 1 and Tier 2 analysts through case reviews, coaching, and pairing during investigations. Partner with Security Engineering, Platform Security, Threat Intelligence, SOC Automation, and additional teams to turn what the SOC learns into stronger detection and response across Nebius. Participate in readiness activities - tabletops, post-incident reviews, and purple-team engagements. Participate in the on-call rotation as the senior point of contact outside business hours. We expect you to have: Experience Around 8-10 years of hands-on experience in security operations or incident response, with a track record of leading complex investigations. Technical Expertise Expert-level investigation capability across multiple domains: endpoint, identity, cloud, and network. Solid understanding of cloud-native environments, including containers, Kubernetes. Deep practical fluency with EDR, SIEM query languages, and log analysis. Deep knowledge of Windows and Linux internals, applied to artifact and behavioral analysis. Fluency in attacker TTPs (MITRE ATT&CK), including the Cloud and Containers matrices. Strong scripting and data-analysis skills (Python, SQL/KQL) for investigation at scale, with the ability to validate findings independently and challenge assumptions. Advanced certifications such as GCIH, GCFA, GNFA, GCFE, or OSCP are an advantage. Leadership & Communication Technical leadership through credibility, raising the team's bar without relying on formal authority. Calm and structured during high-severity incidents, making sound decisions amid uncertainty. Excellent written communication, turning complex investigations to clear narratives others can act on. Fluent in English, written and verbal, comfortable working with international teams and stakeholders. Benefits & Perks: Competitive compensation Career growth and learning opportunities Flexibility and ownership Collaborative and innovative culture Opportunity to work on impactful AI projects International environment and talented teams What's it like to work at Nebius: Fast moving - Bold thinking - Constant growth - Meaningful impact - Trust and real ownership - Opportunity to shape the future of AI Equal Opportunity Statement: Nebius is an equal opportunity employer. We are committed to fostering an inclusive and diverse workplace and to providing equal employment opportunities in all aspects of employment. We do not discriminate on the basis of race, color, religion, sex (including pregnancy), national origin, ancestry, age, disability, genetic information, marital status, veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by applicable law. Applicants must be authorized to work in the country in which they apply and will be required to provide proof of employment eligibility as a condition of hire. If you need accommodations during the application process, please let us know.