Technical Expert – Cyber Security Specialist
Do you want to secure the future infrastructure of a global leader? Our key client is in the midst of a massive digital transformation, and safeguarding our complex ecosystems is our top priority.
We are looking for a Senior Cybersecurity Specialist to be the defensive and offensive brain across our global environments (IT & OT). You will be the bridge between technical vulnerability validation and corporate resilience strategy, acting as the architect of our next-generation security posture.
The Mission: Offensive Security, AI Innovation & Resilience 🎯
You will join a high-impact, international team during a critical stage of growth. This is not just a passive monitoring role; it is a dynamic position designed to redefine how we protect our assets.
Your challenge is twofold: maintaining an ironclad defense and day-to-day operational support, while proactively designing the automation and AI-driven roadmap for a future-proof, cyber-resilient infrastructure.
Key Responsibilities & Daily Focus ⚙️
Your time and impact will be smartly distributed between strategic development, offensive validation, and critical support:
- 75% IT Excellence & 25% OT Convergence: Main focus on securing our complex IT environments while progressively auditing and understanding our Operational Technology (OT) industrial environments.
- Offensive Security & Threat Validation: Lead penetration testing, red/blue/purple teaming exercises, and adversary simulations to uncover vulnerabilities before they are exploited.
- Detection Engineering (Microsoft Ecosystem): Leverage Microsoft Defender and Microsoft Sentinel to analyze large-scale security data, simulate attack patterns, and optimize SOC detection coverage.
- 2nd Level Support (15% Daily Dedication): Act as a key escalation point for traditional security department operations, troubleshooting complex incidents.
- AI-Driven Security Enablement & Automation: Explore, develop, and implement AI/ML use cases for anomaly detection, automated threat analysis, and predictive analytics to scale our defenses.
- The Consultative Bridge: Collaborate closely with MSSP, IT, OT, and Security Architecture teams, translating complex technical vulnerabilities into actionable business recommendations.
What You Need to Shine ✨
Technical Depth:
- Offensive Expertise: Solid hands-on experience in penetration testing, vulnerability assessments, and familiarity with industry frameworks like MITRE ATT&CK.
- Tooling Mastery: Direct experience managing Microsoft Defender and Microsoft Sentinel. Nice to have: Reporting and monitoring via PowerBI.
- Certifications: Professional certifications such as OSCP, CEH, or comparable offensive credentials will be highly valued.
- Standards: Understanding of information security frameworks and regulations (e.g., ISO 27001, NIST CSF) under secure-by-design principles.
Global Mindset & Languages:
- Excellent business English for daily collaboration with international headquarters and global leads.
- Experience or comfort navigating multinational environments and bridging different technical cultures (corporate IT vs. industrial OT).
Soft Skills: The Perfect Fit 🧡
- Team-First Mentality: Cybersecurity is a critical service for us. We need a professional who actively builds strong relationships, supports colleagues and fosters a collaborative, high-trust team environment.
- Operational + Strategic Balance: The stamina to handle day-to-day 2nd level support while maintaining a "big picture" view on automation and future AI integration.
- Hands-on & Curious: You don't just delegate or report; you dive into the "how" and "why" of an exploit to ensure the best defensive outcome.
Why Choose This Role?
- Global Scale: Your findings and resilience strategies directly impact a world-leading corporate infrastructure.
- Flexible Model: Enjoy a highly attractive hybrid model based out of the Madrid Hub.
- Innovation Playground: Be at the forefront of implementing AI and automation directly into active offensive and defensive security operations.
Key Skills
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- Posted
- Jun 18, 2026
- Type
- Full-time
- Level
- Mid-Senior
- Location
- Greater Madrid Metropolitan Area
- Company
- Randstad
Industries
Categories
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