Active TS/SCI Clearance Is Required Onsite in Dallas Metro Area Will Sponsor for Poly Job Title: Sr. Infrastructure Engineer Citizenship: U.S. Citizen Bachelors degree in Science, Technology, Engineering or Mathematics (STEM) and less than 8 years of prior relevant experience. Required Qualifications- Security + or CISSP certification, TS/SCI security clearance- Good collaboration skills- Ability to work in a team environment- Good oral and written communication skills- Ability to work in a multi-discipline environment Technical Skills- Deploying cloud infrastructure using Terraform, Ansible, and Helm- Experience with containerized environments: EKS, EKS Auto Mode, and Kubernetes- Understanding of cloud vs. on prem deployments and configuring resources across both- Proficient in Linux, Chef, Hardening, Scripting, Automation, integration, AWS, Ansible Preferred Qualifications- Broad knowledge of servers, networking, storage, and virtualization- AWS architecture and integration experience- DevSecOps experience with integrated security practices- Experience with cloud metrics and logging dashboards (Grafana, Prometheus, Promtail, Loki)- Strong Linux troubleshooting and automation scripting (Python, Bash)- Familiarity with CI/CD tools (Jira, Confluence, Jenkins, GitLab, Artifactory, Helm)- Experience integrating COTS and FOSS technologies in secure environments