Senior Linux Admin

RHEL 8 and 9 Excellent Linux

A genuinely senior Linux administrator/engineer who can quickly assess the existing environment, identify issues, and independently administer and improve it.

The environment is specifically Red Hat Enterprise Linux 8 and 9.

Core responsibilities / activities

Senior-level administration of RHEL 8/9 systems. Assess the existing Linux environment and identify technical issues or improvements. Configure, maintain, troubleshoot, and support Linux infrastructure. Work within the classified Morpheus private-cloud environment. Support engineers and technical users performing modeling, simulation, and digital-engineering workloads. Potentially participate in automation/IaC and the broader modernization of the environment. Work alongside Windows/Linux admins and multiple engineering disciplines.

This is an opportunity to broaden your skillset into areas like automation logic, cluster management, workload management, and CI/CD integration. We focus on growing as a team, so you’ll share your expertise through leadership and mentoring as you help the team work through challenges and develop new methodologies. As a system administrator leader, you’ll identify new opportunities to modernize the network so your clients achieve their goals. Work with us and resolve daily challenges as we improve our clients’ network infrastructure and bring additional capabilities to the warfighter.

7+ years of experience in Linux Administration Experience with automation tools such as Ansible or Terraform Experience with containers such as Docker, Kubernetes, or Podman Experience with SELinux and FApolicyd, STIG hardening, Identity Management (IdM/LDAP), and managing secrets and certificates Knowledge of IT networking and security concepts Ability to translate complex technical requirements into solutions for clients and engineers TS/SCI clearance Bachelor’s degree in Computer Science, Engineering, or a STEM field DoD 8570 IAT Level II Certification Nice to Have Skills

Experience in administration of RHEL Experience deploying and managing production Kubernetes clusters such as OpenShift, EKS, or RKE Experience with Helm charts, Kustomize, and managing persistent container storage interface (CSI) and container networking interface (CNI) Experience integrating IaC and Ansible into pipelines such as GitLab CI, Jenkins, or GitHub Actions Knowledge of IP tables and NFTables, DNS, load balancing, HAProxy, Nginx, and namespace Ability to use troubleshooting tools such as ss, netstat, tcpdump, traceroute, and ping to isolate network problems Ability to conduct performance tuning, kernel patching, and debugging as well as optimizing Linux kernels for container workloads such as tweaking sysctl for K8s Master’s degree in Computer Science, Engineering, or a STEM field Red Hat Certified Engineer (RHCE) or Linux Foundation Certified Engineer (LFCE) Certification