Senior Windows Server Administrator

Optimal Growth Technologies; Johannesburg; On-site; ZAR 800 000 - 1 000 000; Full time

Job summary

A leading tech company in Johannesburg is seeking a Senior Windows Server / Systems Administrator with 7+ years of experience to manage and optimize their enterprise Windows-based infrastructure. The ideal candidate should possess strong skills in Active Directory, virtualization tools, and system security. This position supports business-critical systems, ensuring high availability and performance, while also adhering to security and compliance standards. Opportunities for professional development are available in this dynamic tech environment.

Qualifications

• 7+ years experience as a Windows Server / Systems Administrator.
• Experience working in enterprise or large-scale IT environments.

Responsibilities

• Install, configure, administer, and maintain Windows Server environments.
• Manage Active Directory, Group Policy, DNS, DHCP, and File/Print services.
• Administer and support virtualized environments.
• Implement and maintain security best practices.

Skills

Windows Server (2012–2022)

Active Directory, GPO, DNS, DHCP

VMware and/or Hyper-V

Backup and recovery solutions

PowerShell scripting

Strong problem-solving and analytical abilities

Excellent communication and stakeholder engagement skills

Ability to work under pressure

Education

Diploma or Degree in Information Technology, Computer Science, or related field

Job description

Job Title: Senior Windows Server / Systems Administrator

Experience Required: 7+ years

Role Overview

We are seeking an experienced and highly skilled Windows Server / Systems Administrator to manage, maintain, and optimize enterprise Windows-based infrastructure. The ideal candidate will have strong hands‑on experience with Windows Server environments, Active Directory, virtualization, and enterprise‑grade infrastructure, with the ability to operate in high‑availability, security‑conscious environments.

This role requires a proactive professional who can ensure system stability, performance, and security while supporting business‑critical systems and users.

Key Responsibilities

Infrastructure & Server Management

• Install, configure, administer, and maintain Windows Server environments (2012/2016/2019/2022).
• Manage Active Directory, Group Policy (GPO), DNS, DHCP, and File/Print services.
• Ensure high availability, performance, and reliability of server infrastructure.
• Perform server monitoring, capacity planning, and performance tuning.

Virtualization & Cloud

• Administer and support virtualized environments (VMware, Hyper‑V).
• Manage backup, disaster recovery, and business continuity solutions.
• Support hybrid or cloud‑based environments (Azure / M365 – advantageous).

Security & Compliance

• Implement and maintain security best practices, patches, and updates.
• Manage user access, permissions, and identity management.
• Ensure systems comply with security policies, standards, and regulatory requirements.

Troubleshooting & Support

• Provide Level 3 support for server, system, and infrastructure‑related incidents.
• Diagnose and resolve complex technical issues efficiently.
• Work closely with network, security, and application teams to resolve cross‑platform issues.

Documentation & Process Improvement

• Maintain accurate technical documentation and system diagrams.
• Develop and improve operational procedures, standards, and automation scripts.
• Participate in infrastructure upgrades, migrations, and projects.

Technical Skills & Experience

Essential

• 7+ years experience as a Windows Server / Systems Administrator.

Strong expertise in

• Windows Server (2012–2022)
• Active Directory, GPO, DNS, DHCP
• VMware and/or Hyper‑V
• Backup and recovery solutions
• PowerShell scripting
• Experience working in enterprise or large‑scale IT environments.

Advantageous

• Microsoft Azure / Hybrid Cloud experience
• Microsoft 365 / Exchange Online
• SCCM / Intune
• Monitoring tools (SCOM, SolarWinds, etc.)
• ITIL‑based service environments

Soft Skills

• Strong problem‑solving and analytical abilities
• Excellent communication and stakeholder engagement skills
• Ability to work under pressure and manage multiple priorities
• High attention to detail and commitment to system stability and security
• Proactive, reliable, and service‑oriented mindset

Qualifications

• Diploma or Degree in Information Technology, Computer Science, or related field
• Microsoft certifications (MCSA, MCSE, Azure) – advantageous but not essential