we are looking for a Head of Security Reliability to establish and lead the Security Reliability pillar. Reporting directly to the CISO, this leader will be accountable for the ongoing effectiveness, resilience, and operational maturity of security products after implementation.
The role ensures that security platforms remain properly configured, maintained, integrated, monitored, adopted, and optimized to deliver measurable risk reduction. It also owns Third-Party Risk Management (TPRM) program and the security-review process for new products, services, and technologies introduced across the company.
This is a hands-on leadership position for someone who combines security expertise, operational discipline, vendor-management experience, and a strong product mindset. The role partners closely with Security, IT, Engineering, Product, Procurement, Legal, Privacy, Compliance, and business stakeholders.
Key responsibilities
Security product reliability and lifecycle ownership
Own security products and platforms after implementation, from operational handover through optimization, renewal, replacement, or retirement.
Ensure security tools are correctly configured, maintained, integrated, monitored, and aligned with Nebius's risk profile and technical environment.
Define ownership, service levels, operating procedures, support models, and escalation paths for every security platform.
Monitor platform availability, data quality, control coverage, integration health, licensing, capacity, and performance.
Establish disciplined processes for upgrades, configuration changes, testing, exception management, and end-of-life planning.
Continuously assess whether security products deliver their intended outcomes, and improve utilization, coverage, automation, and return on investment.
Reduce overlapping capabilities, configuration drift, operational gaps, and underused tooling across the security stack.
Manage vendor performance, technical escalations, product-roadmap discussions, renewals, and service reviews.
Ensure newly implemented security products transition into operations with clear documentation, ownership, monitoring, and success criteria.
Security configuration and control assurance
Define and maintain secure configuration baselines for security platforms.
Establish continuous control-health monitoring to identify disabled, degraded, misconfigured, or incomplete controls.
Validate that integrations and telemetry remain complete, accurate, and reliable as environment evolves.
Coordinate remediation of control gaps with Security, IT, Engineering, and platform owners.
Maintain evidence demonstrating the operational effectiveness of security controls for audits, certifications, and customer-assurance activities.
Requirements: Significant cybersecurity experience, including leadership responsibility in security engineering, security operations, platform security, security architecture, or technology risk.
Proven experience owning security products in production, including configuration, maintenance, integration, optimization, and lifecycle management.
Strong understanding of enterprise and cloud security technologies, architectures, and operating models.
Experience establishing or managing a Third-Party Risk Management program.
Experience performing security architecture, technology, vendor, or product reviews.
Demonstrated ability to translate technical findings into clear business risks and actionable recommendations.
Experience managing teams, budgets, vendors, service providers, and cross-functional programs.
Strong knowledge of security control frameworks and risk-management principles.
Ability to operate effectively in a complex, fast-moving, and highly technical organization.
Excellent communication and stakeholder-management skills, including presenting risks and recommendations to senior leadership.
This position is open to all candidates.