Senior SIEM Engineer

TC-CS-CDR-NG SIEM-Senior At EY, we’re all in to shape your future with confidence. We’ll help you succeed in a globally connected powerhouse of diverse teams and take your career wherever you want it to go. Join EY and help to build a better working world. NGSIEM JD details for Senior Senior Role Summary The NG SIEM Senior role leads ingestion engineering, detection creation, and integrated case management and correlation workflows. This role partners with threat, cloud, and IR teams to enhance automation, reduce noise, and strengthen the SIEM–SOAR ecosystem. Key Responsibilities Lead onboarding of strategic log sources via Cribl, cloud collectors, API pipelines. Build and optimize parsing, normalization, and enrichment logic. Create advanced detections mapped to MITRE ATT&CK using SPL/KQL/CQL/CQL-Advanced. Design and optimize correlation logic using Fusion/ML-based engines. Lead tuning and noise-reduction activities for Fusion correlation rules. Oversee case lifecycle management: tria...