Senior Linux Administrator at Optimal Growth Technologies

Job Overview:

• We are seeking an experienced Senior Linux Administrator to manage, optimize, and maintain our Linux-based infrastructure. The ideal candidate will have 7+ years of hands-on experience in administering Linux systems, troubleshooting complex issues, and implementing security best practices. This role requires a deep understanding of server management, automation, networking, and cloud technologies, ensuring high availability and performance across our IT landscape.

Key Responsibilities:

System Administration & Maintenance:

• Manage, configure, and maintain Linux-based servers (RHEL, CentOS, Ubuntu, or Debian).
• Perform system monitoring, tuning, and performance optimization.
• Troubleshoot and resolve hardware, software, and network-related issues.
• Manage patching, updates, and OS security hardening.
• Ensure high availability and reliability of Linux systems.

Security & Compliance:

• Implement and maintain system security, firewalls, and intrusion detection.
• Ensure compliance with industry security standards (ISO 27001, NIST, CIS, etc.).
• Manage user access, authentication, and identity management solutions.
• Conduct system audits and vulnerability assessments.

Automation & Scripting:

• Develop and maintain automation scripts using Bash, Python, or Ansible.
• Implement Infrastructure as Code (IaC) using Terraform or Ansible.
• Streamline deployments, monitoring, and configuration management.

Cloud & Virtualization:

• Deploy, configure, and manage Linux workloads in AWS, Azure, or Google Cloud.
• Work with virtualization platforms like VMware, KVM, or Proxmox.
• Implement and manage containerization solutions such as Docker and Kubernetes.

Storage & Backup Management:

• Configure and manage file systems, LVM, and RAID setups.
• Implement and maintain backup and disaster recovery strategies.
• Work with networked storage solutions (NFS, SAN, iSCSI, etc.).

Networking & Troubleshooting:

• Manage network services such as DNS, DHCP, VPN, and Load Balancers.
• Troubleshoot network connectivity and performance issues.
• Implement secure networking practices, including SSH and SSL/TLS configurations.

Collaboration & Documentation:

• Work closely with DevOps, security, and development teams.
• Document system configurations, procedures, and troubleshooting guides.
• Provide mentorship and guidance to junior administrators.

Required Qualifications & Skills:

• 7+ years of experience as a Linux Administrator or Engineer.
• Strong knowledge of RHEL, CentOS, Ubuntu, or other Linux distributions.
• Proficiency in Bash, Python, or Ansible for automation.
• Hands-on experience with cloud platforms (AWS, Azure, or GCP).
• Experience with virtualization technologies (VMware, KVM, Proxmox, etc.).
• Deep understanding of networking concepts (TCP/IP, DNS, Firewalls, VPNs, etc.).
• Strong security knowledge, including SELinux, iptables, and audit logs.
• Experience with configuration management tools (Ansible, Puppet, Chef).
• Knowledge of containerization (Docker, Kubernetes) is a plus.
• Familiarity with CI/CD pipelines and DevOps methodologies is advantageous.
• Excellent problem-solving, communication, and documentation skills.

Education & Certifications 

• Bachelor’s degree in Computer Science, IT, or a related field.
• Certifications such as RHCSA, RHCE, LFCS, AWS Certified SysOps Administrator, or LPIC-2/LPIC-3 are highly desirable.