CALIBRE is an employee-owned mission focused solutions and digital transformation company. We are seeking a Senior Infrastructure Engineer to design, deploy, and secure cloud-native and Kubernetes-based platforms for government clients. This role includes supporting Spectro Cloud Kubernetes installations in classified and air-gapped environments. You will be instrumental in building and automating Linux and hybrid cloud infrastructure to enable secure and scalable mission outcomes.This position can be based in Melbourne, FL; Huntsville, AL; Denver, CO; or Salt Lake City, UTKey Responsibilities:Architect and deploy secure, scalable Linux and Kubernetes infrastructures for government environments.Guide client teams on cloud adoption, infrastructure modernization, and DevSecOps best practices.Implement automation using Ansible, Terraform, and CI/CD tools to streamline infrastructure operations.Ensure compliance with cybersecurity frameworks such as STIG, RMF, and related DoD requirements.Troubleshoot and optimize performance across complex, distributed systems.Mentor client teams on Kubernetes operations, infrastructure automation, and secure cloud practices.Required SkillsStrong experience in Linux infrastructure and cloud-native environmentsHands-on Kubernetes administration (2+ years)CI/CD pipeline development and management (3+ years) using GitLab, Jenkins, ArgoCD, etc.Automation expertise with Ansible, Terraform, Python, and BashExperience securing and troubleshooting distributed systemsKnowledge of DoD security frameworks (STIG, RMF)Strong communication and mentoring abilitiesDoD 8570 IAT Level II certification (Security+ or equivalent)Required ExperienceU.S. Citizenship with active Top Secret clearance8+ years of infrastructure engineering experience2+ years of Kubernetes administration3+ years of CI/CD pipeline workWillingness and ability to travel up to 50%Preferred Experience:Experience with Spectro Cloud KubernetesVMware and Windows infrastructure in hybrid environmentsFamiliarity with RMF and ATO processesCertifications such as CKA, CKAD, RHCE, AWS, AzureGitOps tools (ArgoCD, Flux)Exposure to edge computing and air-gapped deploymentsStrong experience in Linux infrastructure and cloud-native environmentsHands-on Kubernetes administration (2+ years)CI/CD pipeline development and management (3+ years) using GitLab, Jenkins, ArgoCD, etc.Automation expertise with Ansible, Terraform, Python, and BashExperience securing and troubleshooting distributed systemsKnowledge of DoD security frameworks (STIG, RMF)Strong communication and mentoring abilitiesDoD 8570 IAT Level II certification (Security+ or equivalent)U.S. Citizenship with active Top Secret clearance8+ years of infrastructure engineering experience2+ years of Kubernetes administration3+ years of CI/CD pipeline workWillingness and ability to travel up to 50%Preferred Experience:Experience with Spectro Cloud KubernetesVMware and Windows infrastructure in hybrid environmentsFamiliarity with RMF and ATO processesCertifications such as CKA, CKAD, RHCE, AWS, AzureGitOps tools (ArgoCD, Flux)Exposure to edge computing and air-gapped deployments