Overview About Business Unit: A consolidated team of database technology professionals, we deliver expert insights across all major database engines and Big Data solutions to support Epsilon products and platforms. The team has a one-of-a-kind alignment that combines a horizontal organizational structure with vertically aligned sub-groups dedicated to our clients. By adhering to consistent standards and methodologies, the team ensures operational excellence and has close ties with product teams at Oracle, IBM, Cloudera, Amazon and Microsoft. Overview: We are seeking an experienced ELK Stack Administrator to manage, maintain, and optimize our Elasticsearch clusters in production environments. The ideal candidate will have strong expertise in Elasticsearch, Kibana, and Logstash administration, along with solid experience in Linux systems, automation tools, and monitoring/observability platforms. This role focuses on cluster administration, deployment, performance tuning, scaling, and monitoring, rather than application development. Click here to view how Epsilon transforms marketing with 1 View, 1 Vision and 1 Voice. Responsibilities Install, configure, and administer Elasticsearch, Kibana, and Logstash (ELK Stack) in production environments. Manage Elasticsearch clusters, including: Index lifecycle management Shard allocation and optimization Replication management Backups and restores Perform cluster scaling, performance tuning, and troubleshooting. Configure and maintain Logstash pipelines and data ingestion workflows. Create and maintain Kibana dashboards and monitoring visualizations. Implement and support Observability, Monitoring, and SIEM use cases. Manage security configurations, including: Roles and users TLS encryption RBAC policies Perform stack upgrades, patching, and regular health checks. Collaborate with DevOps, Infrastructure, and Monitoring teams. Ensure high availability and disaster recovery readiness. Use Infrastructure as Code (IaC) and automation tools to manage deployments and configurations. Qualifications Required Skills: 5+ years of hands-on experience administering Elasticsearch, Kibana, and Logstash. Strong understanding of: Elasticsearch cluster architecture Index management and shard optimization Query performance tuning Snapshot and restore processes Experience with Linux system administration (RHEL / Ubuntu). Experience with Infrastructure as Code and automation tools: Terraform Ansible Experience with version control systems: Git Bitbucket Knowledge of Monitoring and Observability concepts. Experience handling production incidents and troubleshooting. Basic scripting skills (Shell or Python preferred). Understanding of SIEM and APM concepts. Good to Have: Experience with Elastic Stack X-Pack features. Experience integrating ELK with cloud platforms (AWS / Azure / GCP). Knowledge of Elastic concepts and Beats, such as: Filebeat Metricbeat Elastic Serverless forwarder APM servers Elastic Agent Elastic Fleet architecture Exposure to containerized environments: Docker Kubernetes Additional Information Epsilon is a global data, technology and services company that powers the marketing and advertising ecosystem. For decades, we’ve provided marketers from the world’s leading brands the data, technology and services they need to engage consumers with 1 View, 1 Vision and 1 Voice. 1 View of their universe of potential buyers. 1 Vision for engaging each individual. And 1 Voice to harmonize engagement across paid, owned and earned channels. Epsilon’s comprehensive portfolio of capabilities across our suite of digital media, messaging and loyalty solutions bridge the divide between marketing and advertising technology. We process 400+ billion consumer actions each day using advanced AI and hold many patents of proprietary technology, including real-time modeling languages and consumer privacy advancements. Thanks to the work of every employee, Epsilon has been consistently recognized as industry-leading by Forrester, Adweek and the MRC. Epsilon is a global company with more than 9,000 employees around the world. Our pillars aren't just words. They're how we show up every day. People centricity: We focus on employee well-being in an environment where colleagues truly care about each other. Collaboration: We work together, support one another, and collectively achieve goals. Growth: There are endless opportunities for growth through learning, development and career advancement. Innovation: We drive progress through cutting-edge solutions and forward-thinking approaches. Flexibility: We’ve created a balance between work and personal life, and we encourage adaptability to solve problems creatively. Our values guide us to create value for our clients, our people and consumers. Act with integrity Work together to win together Innovate with purpose Respect all voices Empower with accountability These pillars and values are our foundation—shaping our culture, guiding our decisions, and uniting us in common purpose. Epsilon is an Equal Opportunity Employer. Epsilon is committed to promoting diversity, inclusion, and equal employment opportunities by using reasonable efforts to attract, recruit, engage and retain qualified individuals of all ethnicities and backgrounds, including, but not limited to, women, people of color, LGBTQ individuals, people with disabilities and any other underrepresented groups, traits or characteristics.