SIEM Engineer - Senior - EY GDS Spain - Hybrid

The opportunity

Are you ready to shape your future with confidence?

As a Senior SIEM Engineer, you are part of the EY Cyber Security team, working in a Threat Detection & Response (TDR) environment with a strong focus on Microsoft Sentinel and XDR. You design, integrate, and operate SIEM use cases and automations and support clients in securely operating modern cloud-native security platforms. Knowledge of Splunk or open-source SIEM ecosystems (e.g., Elastic/ELK, Wazuh) is considered a strong advantage.

As a member of our team in the EY GDS Spain office in Malaga, you'll have a chance to extend your knowledge & experience by working on interesting projects with the latest technologies and approaches. You'll support clients in choosing the most suitable business solution and take part in digital transformation.

Your key responsibilities

· Integrate data sources into Microsoft Sentinel (cloud, identity, endpoint, network, and on-prem) and ensure data quality and normalization.

· Design, implement, and operate analytics rules, SIEM use cases, and hunting queries (KQL; SPL experience is a plus).

· Develop and maintain playbooks and automations using Azure Logic Apps to enrich, orchestrate, and standardize response workflows.

· Act as a technical subject matter expert for SIEM and Microsoft Sentinel/XDR solutions and provide hands-on guidance to stakeholders.

Optimize SOC Operations leveraging the latest AI capabilities

· Continuously optimize detection, response, and automation capabilities (tuning, false-positive reduction, performance, and maintainability).

· Contribute to engineering best practices such as documentation, repeatable deployments, and (where applicable) detection/content as code.

Skills and attributes for success

· Strong knowledge of cloud security concepts, SIEM architectures, and the MITRE ATT&CK framework.

· Hands-on engineering mindset with solid troubleshooting, analytical thinking, and attention to detail.

· Pragmatic communicator who can translate complex technical topics into actionable recommendations for different audiences.

· Ownership and quality focus: audit-ready documentation, structured delivery, and continuous improvement.

Curiosity on new technologies and approaches and readiness to constantly develop and reinvent the way we work

To qualify for the role, you must have

· 2 - + 4 years of experience in SIEM engineering (design, onboarding, use case development, tuning, and operations), ideally with Microsoft Sentinel.

· Hands-on experience with Azure, Windows/Linux, and scripting (e.g., Python, PowerShell, Bash) as well as automation concepts.

· Experience building or operating SOAR-style automations (e.g., Logic Apps / playbooks) in a security operations context.

· English at least B2 (written and spoken) is required.

Ideally, you'll also have

· Splunk experience (SPL, data onboarding, correlations, dashboards) and/or open-source SIEM experience (e.g., Elastic/ELK, Wazuh).

· Experience working in regulated environments and familiarity with operational processes (ITSM, incident workflow alignment).

· Relevant certifications (e.g., SC-200, AZ-500, or comparable cloud/security certifications) are a plus.

What we look for:

We look for engineers who build detections that stand up in real operations-reliable, scalable, and automated where it matters. You take ownership, collaborate across teams and time zones, and continuously improve signal quality from data onboarding to response workflows.

What we offer

In EY GDS Spain, we're committed to fostering a vibrant environment where every team member can thrive. We provide a space for continuous learning and the flexibility of a hybrid work model. Our culture values inclusion, professional development, wellbeing, volunteering opportunities, and recognition of performance.
Additionally, here's what makes us stand out:

• Empowering Career Development: Unlock your potential with tailored training and development programs designed to elevate your skills and propel your career forward. We invest in your growth because your success is our success.
• Flexible Work-Life Integration: Enjoy the freedom of our hybrid work model, allowing you to blend professional responsibilities with personal passions. We understand that life is more than just work, and we support you in achieving that balance.
• Comprehensive Well-Being Programs: Prioritize your health with our extensive wellness initiatives, including psychological support sessions and health resources. At EY GDS Spain, your well-being is at the heart of what we do.
• Meaningful Volunteering Opportunities: Make a difference in your community through our engaging volunteering programs. Join us in giving back and creating a positive impact while building connections with like-minded colleagues.
• Recognized Performance and Rewards: Celebrate your achievements with our recognition programs that honor both individual and team successes. We believe in acknowledging hard work and dedication, ensuring you feel valued every step of the way.
  
  

Join us at EY GDS Spain, where your journey is supported, your contributions are celebrated, and your future is bright.

To learn more about what we offer, visit our Careers in Global Delivery Services | EY - Global

About EY GDS

EY Global Delivery Services (EY GDS) is a dynamic and truly global delivery network of over 75,000 people working across the world, to provide innovative and strategic business solutions to our clients worldwide. We play a vital role in growth strategy, helping our clients become agile and efficient, and helping fulfill our purpose to build a better working world.

From accountants to coders, we offer a wide variety of fulfilling career opportunities that span all business disciplines. We look for skills that are evergreen and our roles evolve with industry trends. We also work across Finance, Business Development, Technology, Talent, Procurement and Risk Management functions to help our teams operate as efficiently and effectively as possible.

Across our 10 locations and 21 cities, we work with teams from all service lines, geographies, and sectors. We operate in Argentina, Hungary, India, the Philippines, Poland, Sri Lanka, Mexico, Spain and the United Kingdom.

Our EY GDS Spain office is located at Malaga Technology Park and currently employs over 1000 people.

If you are interested in being part of our team, we kindly invite you to submit your CV in English to apply for this position.

The exceptional EY GDS experience. It's yours to build.