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IT Systems and Network Administrator
Location: | Johannesburg |
Type: | Permanent |
Company: | Greatstock |
Key responsibilities
- Design, implement, and maintain Windows Server infrastructure, including Active Directory, Group Policy, and network services (DNS, DHCP).
- Manage and optimise the Microsoft 365 environment, including Exchange Online, SharePoint, Teams, and Azure Active Directory (AD).
- Administer and maintain Microsoft SQL Server instances, including backup and recovery processes.
- Configure and manage SAN storage infrastructure, including capacity planning, performance optimisation, and data replication.
- Manage Windows File Servers, including permissions, quotas, data governance, and access policies.
- Oversee enterprise data storage solutions, ensuring effective data lifecycle management and storage tiering.
- Monitor system performance, security, and availability while identifying and implementing improvements.
- Plan and execute system upgrades, patches, and maintenance activities with minimal disruption to business operations.
- Configure and maintain network infrastructure, including firewalls, switches, and VPNs.
- Ensure compliance with security policies and industry best practices.
- Implement and maintain backup and disaster recovery solutions to safeguard critical data.
- Create and maintain comprehensive technical documentation and system inventory.
- Evaluate, recommend, and assist in procuring IT assets and services.
- Provide technical support and collaborate with users to resolve issues across Windows and Mac environments
- Bachelor’s degree or diploma in computer science, information technology, or a related field.
- Five+ years of experience administering Windows Server environments.
- Expertise in Microsoft 365 administration and Azure AD.
- Knowledge of endpoint management solutions (e.g., Intune, ESET).
- Current certifications (e.g., CompTIA A+, MCSA, MCSE, Microsoft Certified: Azure Administrator).
- Proven experience with network infrastructure and security.
- Strong knowledge of backup, recovery, and business continuity practices.
- Excellent problem-solving and analytical skills.
- Strong communication and documentation abilities.
- Experience managing hybrid cloud environments.
- Advanced Microsoft certifications (e.g., Microsoft 365 Certified: Enterprise Administrator Expert).
- Familiarity with monitoring tools and ITSM platforms.
- Additional certifications in networking or security (e.g., CCNA, CompTIA Security+, CompTIA Network+).
- Proficiency in PowerShell scripting and automation.
Posted on 24 Mar 08:39, Closing date 19 May
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See also: Administrator
IT Systems and Network Administrator
Johannesburg
We are seeking a skilled IT systems and network administrator to manage and maintain our organisation's Microsoft Windows and Microsoft 365 infrastructures.
We are seeking a skilled IT systems and network administrator to manage and maintain our organisation's Microsoft Windows and Microsoft 365 infrastructures.

