Senior Linux System Administrator

Key Responsibilities

• Lead the administration of Linux environments (RHEL 8/9 preferred), RedHat/CentOS 8/9 environments, performing tasks at a level equivalent to a (RHCSA) RedHat Certified Engineer.
• Administering virtualized environments such as VmWare and/or Proxmox.
• Scripting using Bash, Python, PERL, and/or Ruby.
• Experience with container technology initiatives, including Docker, Podman, and libvirt.
• Experience with configuring and running Kubernetes.
• Experience with HPC software such as Warewulf and Slurm.
• Oversee the configuration and management of BIND servers for IP address space management.
• Manage and optimize local and network file systems, including permissions, encryption, and ACLs.
• Supervise the administration of NAS storage appliances, ensuring high availability and performance.
• Mentor junior administrators in scripting using bash, Python, PERL, and Ruby.

Infrastructure Management

• Lead the installation, update, and management of software core services, and system configurations using Ansible and bash shell scripts.
• Provide expert-level management and troubleshooting of FreeIPA and Linux-based LDAP servers for authentication.
• Ensure comprehensive system security through basic firewall and SELinux configurations.
• Lead change management efforts, to create and execute change requests for maintenance, including documentation and after-action reports.
• Oversee the administration of multiple NAS appliances providing File, Block, and Object storage solutions.
• Develop and maintain advanced Ansible scripts to automate service configurations and optimize infrastructure performance.
• Supervise the monitoring of environments with tools like Nagios, Zabbix, Sensu, and Prometheus.
• Oversee the provisioning, management, and decommissioning of virtual servers in VMware.

Documentation and Issue Tracking

• Ensure the maintenance of comprehensive system documentation in the online wiki.
• Analyze security vulnerabilities, generate remediation plans, and execute remediation.
• Ensure proper project documentation including lifecycle and deadline specification.
• Lead efforts in issue tracking using JIRA, ensuring project lifecycles are managed effectively.

Troubleshooting and Analysis

• Lead troubleshooting efforts in a scientific computing environment, identifying and resolving complex issues.
• Analyze and document running services, providing insights into process execution and service optimization.
• Develop and implement strategies to enhance system performance and reliability.

Security and Compliance

• Maintain and oversee secure password management protocols.
• Lead security compliance initiatives, ensuring adherence to all company and customer policies and procedures.
• Perform advanced security vulnerability analysis and execute comprehensive remediation plans.