Systems Administrator (Windows/Linux - Migrations)

We are seeking a Senior Support Technician to support a large-scale infrastructure modernization effort focused on upgrading and migrating legacy Windows Server and RHEL systems. This role will play a key part in improving system performance, security, and stability across enterprise environments., * Lead migration of legacy Windows Server and RHEL systems to modern, supported environments

• Assess existing systems and develop upgrade strategies based on risk, security, and business impact
• Execute OS upgrades and system rebuilds while minimizing downtime and disruption
• Perform system validation post-migration (performance, compatibility, networking, services)
• Configure and maintain system settings including security, storage, and networking
• Automate system administration tasks using tools such as PowerShell, Bash, and Ansible
• Apply system hardening, patching, and vulnerability remediation in line with security standards
• Troubleshoot and resolve system and application issues across Windows and Linux environments
• Support backup, recovery, and disaster recovery planning and execution
• Document system configurations, migration activities, and operational procedures
• Collaborate with cross-functional teams to ensure successful system integration and delivery
• Provide ongoing support and optimization of systems post-migration

The ideal candidate has strong experience in system administration, OS migrations, and automation, with the ability to work across both Windows and Linux environments. This is a hands-on role requiring troubleshooting expertise, a security-first mindset, and collaboration with cross-functional IT teams in a hybrid work environment., 8+ years of experience administering both Windows Server and RHEL environments

• Proven experience performing OS upgrades and migrations (legacy/EOL systems preferred)

• Strong hands-on experience with RHEL (5-9) and Windows Server (2008-2022)

• Proficiency in scripting and automation (PowerShell, Bash, Ansible)

• Experience with system hardening, patching, and vulnerability remediation

• Strong troubleshooting skills across both Linux and Windows systems

• Experience working in virtualized environments (e.g., VMware)

• Strong documentation and cross-team collaboration skills

Nice to Have:

• Experience with STIG/CIS compliance and security frameworks

• Familiarity with vulnerability scanning tools (e.g., Nessus, OpenSCAP)

• Experience with backup and disaster recovery solutions

• Relevant certifications (Security+, RHCSA/RHCE, Microsoft certifications)