Sr Splunk Migration Engineer

Marathon TS is seeking a highly skilled Splunk to Elastic Migration Engineer to lead and execute end-to-end SIEM modernization initiatives. This role is responsible for designing and implementing Elastic deployments using the Elastic Cloud on Kubernetes (ECK) model, migrating legacy Splunk knowledge objects, detections, and data pipelines, and ensuring operational readiness through cutover validation and workflow integrations. The ideal candidate has deep hands-on experience with SIEM engineering, detection engineering, Elastic Stack architecture, and security operations workflows-particularly within enterprise or federal environments.

• 5+ years’ experience in SIEM engineering or security operations
• Hands-on experience with Elastic Stack (Elasticsearch, Kibana, Elastic Security)
• Proven experience migrating from Splunk to Elastic or similar SIEM platforms
• Strong understanding of:SIEM data models and schemas
• Elastic Common Schema (ECS) Field Mappings
• Detection engineering and alert tuning
• Experience with Kubernetes and the ECK deployment model
• Strong scripting or automation skills (Python, Bash, etc.)
• Provide post-cutover from legacy platforms to Elastic, ensuring continuity of operations
• Migrate an existing Splunk SIEM environment (approximately 6 TB/day of data) to Elastic SIEM.
• Active TS clearance