Senior Systems Administrator (Windows & Linux Migration)

Skills:

Windows Server Administration, Linux (RHEL) Administration, System Migration & Upgrades, Bash/PowerShell/Ansible Scripting, Patch Management, System Security & Hardening, VMware, SCCM, Troubleshooting, Backup & Recovery

We are seeking an experienced Senior Systems Administrator to support the migration and modernization of end-of-life (EOL) systems. This role will focus on upgrading legacy environments, including older versions of Windows Server and Red Hat Enterprise Linux (RHEL) , to supported platforms to improve security, performance, and operational stability.

Key Responsibilities:

• Lead migration and upgrade of legacy systems to supported versions of Windows Server (2016/2019/2022) and RHEL (7/8/9)
• Administer and support both Windows and Linux (RHEL) environments
• Perform in-place upgrades and fresh installations of operating systems
• Troubleshoot and resolve issues in legacy and modernized environments
• Implement system automation and scripting using Bash, PowerShell, and Ansible
• Manage patching, system hardening, and vulnerability remediation
• Support backup and recovery solutions for system reliability
• Work with virtualization technologies (VMware) to support infrastructure needs
• Utilize configuration management tools such as Ansible, SCCM , and PowerShell
• Ensure compliance with security and operational standards

Required Qualifications:

• 8+ years of experience with Windows Server and RHEL environments
• Strong experience with RHEL (5/6/7/8/9) and Windows Server (2008–2022)
• Proven experience with system migration and OS upgrades
• Strong troubleshooting skills for legacy systems
• Experience with automation and scripting (Bash, PowerShell)
• Knowledge of system security, patching, and vulnerability management

Preferred Qualifications:

• Experience with configuration management tools (Ansible, SCCM)
• Familiarity with virtualization technologies (VMware)
• Experience with backup and disaster recovery solutions
• Strong documentation and communication skills

Skills:

• Windows Server Administration
• Linux (RHEL) Administration
• System Migration & Upgrades
• Automation & Scripting (Bash, PowerShell, Ansible)
• Patch Management & Security
• VMware / Virtualization
• Troubleshooting & Performance Optimization