> Markdown version of [/jobs/ext/147906-sr-linux-systems-administrator](https://www.wearedevelopers.com/jobs/ext/147906-sr-linux-systems-administrator). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Linux Systems Administrator - **Company:** RedLine Performance Solutions, LLC - **Location:** Aberdeen, MD, United States - **Experience:** Expert - **Salary:** $140,000.0 - $180,000.0 - **Contract:** Permanent contract - **Skills:** Application Integration Architecture, Audit Trail, Cloud Storage, Computer Networks, Continuous Integration, Linux, Domain Name System (DNS), Key Management, Lightweight Directory Access Protocols (LDAP), Linux System Administration, Node.Js, Role-Based Access Control, Management of Software Versions, Weka, Data Logging, High Performance Computing, System Availability, Infrastructure as Code (IaC), Gitlab, Redline, Containerization, Kubernetes, Infrastructure Automation Frameworks, Slurm, Artifactory - **Published:** May 23, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=416c43b4fb3c88d9 ## About the Role Do you have experience in Tooling?, An active DoD Top Secret security clearance is a requirement to apply, as are current Linux+ and Security+ (or equivalent) certifications. This position on-site at the customer location in Aberdeen, Maryland. Relocation may be considered. This full-time position offers a full benefits package including paid time off, 401k match, and health care benefits., * Proven experience in systems administration, particularly in Linux-based environments * Extensive hands-on experience designing, building, and operating production Kubernetes clusters * Deep understanding of Kubernetes networking, security principles (RBAC, Network Policy, Pod Security Standards), and storage (CSI) * Strong knowledge of container runtimes (containers) and the full node lifecycle * Experience integrating applications and platforms with identity management systems like LDAP or FreeIPA * Familiarity with operating CI/CD pipelines and associated tools (e.g., GitLab, Artifactory, Harbor). Preferred Skills: * Specific experience with RKE2 is highly desirable * Experience working in secure, compliance-driven environments (e.g., CUI, DoD) * Knowledge of integrating Kubernetes with HPC schedulers (Slurm, PBS) and high-performance storage (Lustre, Weka) * Proficiency with observability stacks for monitoring, logging, and alerting * Experience with Infrastructure as Code (IaC) and configuration management tools * Demonstrated ability to design and test high-availability and disaster recovery plans. ## Description RedLine is looking for an Sr. Linux Systems Administrator to join us. The successful candidate will be responsible for the architecture, operation, and maintenance of a critical High-Performance Computing (HPC) and Kubernetes infrastructure. This role requires a deep understanding of cloud-native technologies, robust security practices, and large-scale system administration to maintain a secure and reliable platform., Kubernetes platform architecture and operations * Design, deploy, and operate highly available RKE2 Kubernetes clusters, including multi-control-plane environments with stable etcd quorum * Manage Kubernetes versioning upgrades and compatibility, along with cluster certificate authorities and trust chains * Oversee complete lifecycle of Kubernetes nodes (cordon, drain, replacement) and operate container runtimes like containerd * Tune kubelet behavior, manage resource pressure, and ensure consistent node configuration across all environments Networking, security, and identity * Design and operate Kubernetes networking (CNI), implement network policies for workload isolation, and manage ingress controllers and DNS configurations * Implement and enforce security best practices, including RBAC, admission controls, pod security standards, secrets management, and audit logging * Perform routine systems administration and apply necessary STIGs and OS maintenance to ensure compliance for CUI-level operations * Integrate Kubernetes with enterprise identity services (LDAP/FreeIPA) and implement SSO with support for CAC/MFA Data, CI/CD, and Reliability * Design and operate Kubernetes storage solutions using CSI drivers (Lustre, Weka), manage persistent volumes, and integrate S3 object storage * Operate and maintain CI/CD infrastructure, including GitLab and container registries (Harbor, Artifactory), to support developer workflows * Implement comprehensive monitoring, logging, and alerting. Lead incident response, perform capacity planning, and maintain operational runbooks * Architect for high availability, define RPO/RTO, and implement robust backup, restore, and failover procedures for all stateful services * Integrate Kubernetes workloads with HPC schedulers like Slurm/PBS and enable seamless, secure job submission and identity mapping between platforms. ## Related Videos - [Running Secure Life Science Research at Scale using Hybrid GPU HPC and Kubernetes 🧬](https://www.wearedevelopers.com/videos/100355-running-secure-life-science-research-at-scale-using-hybrid-gpu-hpc-and-kubernetes) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Remote Driving on Plant Grounds with State-of-the-Art Cloud Technologies](https://www.wearedevelopers.com/videos/251-remote-driving-on-plant-grounds-with-state-of-the-art-cloud-technologies) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [How I saved 200K/yr in direct costs writing 0 code lines in K8s](https://www.wearedevelopers.com/videos/1055-how-i-saved-200k-yr-in-direct-costs-writing-0-code-lines-in-k8s) - [Discover the open source trio you didn’t expect: .NET and PostgreSQL on Linux](https://www.wearedevelopers.com/videos/2042-discover-the-open-source-trio-you-didn-t-expect-net-and-postgresql-on-linux) ## Related Articles - [Learning Kubernetes made easy with KubeCampus](https://www.wearedevelopers.com/magazine/348-learning-kubernetes-made-easy-with-kubecampus) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing)