Senior System Administrator

We are looking for an experienced System Administrator to join the Core Applications Infrastructure team within our Technology Division.

This role involves full responsibility for the operation, maintenance, and continuous improvement of complex enterprise infrastructure in a large-scale organization.

Key Responsibilities:

• Administration, maintenance, and upgrades of Microsoft Windows Server environments- including Active Directory, Group Policy, DNS, DHCP, WSUS.
• Expert-level management of Microsoft IIS environments- including configuration, SSL certificates, Application Pools, Web config, and performance optimization.
• Management of virtualization environments based on VMware- including ESXi, vCenter, Templates, Cloning, Snapshots.
• Automation and scripting using PowerShell- including building complex workflows.
• Network traffic analysis and troubleshooting using tools such as Wireshark, Netmon, TCPDump.
• Planning and maintaining load balancing solutions.
• Performance monitoring and system optimization.
• Participating in infrastructure projects such as migrations, version upgrades, and system hardening.

Requirements:

• At least 7 years of hands-on experience managing and optimizing Microsoft IIS in enterprise environments.
• At least 3 years of proven experience as a System Administrator in a large-scale enterprise environment.
• Strong hands-on experience with Windows Server infrastructure- including AD, GPO, DNS, DHCP.
• Minimum 2 years’ experience with VMware- installation, resource management, troubleshooting.
• Strong PowerShell scripting skills- advantage for experience with Desired State Configuration.
• Solid knowledge of network protocols and architecture (TCP/IP, HTTP/S, RDP).
• Experience working on projects involving upgrades, migrations, or new deployments- including version details in CV.

Advantages:

• Experience in system hardening, WAF, enterprise antivirus, NAC.
• Familiarity with Azure AD, ADFS, Conditional Access.

Skills:

• System-wide vision and creative problem-solving.
• Excellent interpersonal skills and service-oriented mindset.
• Ability to work independently and as part of a team.
• Quick learner with strong technical curiosity.