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Linux System Administrator
King of Prussia, PAJPC Partners is looking for a highly skilled and proactive Linux and OpenShift Systems Administrator to join a team in managing and supporting systems within disconnected and air-gapped environments. The ideal candidate will have deep expertise in Linux system administration, Red Hat OpenShift, and automation using Ansible and GitOps methodologies (with a focus on Argo CD). This role involves maintaining high availability, optimizing performance, ensuring system security, and achieving compliance with regulatory standards.
Key Responsibilities:
Key Responsibilities:
- Administer, configure, and maintain Linux (Red Hat/Oracle) and OpenShift clusters, ensuring high availability, reliability, and compliance in air-gapped and disconnected environment
- Design and implement automation solutions using Ansible, including playbook development, role creation, and workflow orchestration focused on configuration management, deployment, and system maintenance
- Leverage GitOps principles using Argo CD for continuous deployment and environment synchronization.
- Conduct performance tuning and system optimization across Linux and OpenShift environments.
- Apply security best practices for hardening systems, implementing access controls, auditing, and patch management in line with organizational and regulatory requirements (e.g., NIST, STIG, CIS).
- Perform system monitoring, incident response, and root cause analysis for system failures and performance issues.
- Maintain documentation of infrastructure configuration, operational procedures, and troubleshooting guides.
- Collaborate with cross-functional teams including DevOps, security, and network engineering to support application deployments and environment provisioning.
- Support change management, version control, and configuration management processes in restricted networks.
- Provide knowledge transfer and mentoring to internal staff, fostering a culture of continuous improvement and operational excellence
- Stay up-to-date with the latest tools, technologies, and industry trends related to Linux, OpenShift, and infrastructure automation.
Required Qualifications:
- 5+ years of experience as a Linux systems administrator in enterprise or mission-critical environments. Red Hat Enterprise Linux preferred.
- 3+ years of OpenShift administration, including deployment, configuration, upgrades, and troubleshooting.
- Proven experience managing systems in disconnected or air-gapped environments.
- Advanced proficiency with Ansible, including automation of system tasks and infrastructure as code (IaC).
- Hands-on experience with Argo CD and GitOps workflows in Kubernetes/OpenShift environments.
- Solid understanding of networking, DNS, storage, and container orchestration concepts.
- Experience with security hardening, compliance auditing, and configuration baselining (e.g., SCAP, OpenSCAP).
- Familiarity with CI/CD pipelines, source control (Git), and DevSecOps principles.