Senior SIEM Engineer - EY GDS Spain - Hybrid

SIEM Engineer – Senior – EY GDS Spain – Hybrid

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.

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 ma...