Senior Systems Administrator

🏢 Optimal Growth Technologies · all 7 jobs
📍 South Africa
📅 Posted Aug 13, 2026 · via Himalayas
🏷 Systems Administration, Senior Systems Administrator, It Infrastructure Management, Windows Administration, Linux Administrator, Senior System Administrator +5 more
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Sr. Sys Administrator
12 month - Fully Remote Contract
Responsibilities:

- Manage and maintain the organization's IT infrastructure, including servers, networks, and storage systems.

- Oversee the administration of Windows and Linux servers, ensuring optimal performance, security, and availability.

- Implement and manage virtualization solutions, such as VMware or Hyper-V.

- Develop and maintain backup and disaster recovery plans, ensuring data integrity and availability.

- Monitor system performance and network connectivity, troubleshooting and resolving issues promptly.

- Implement and enforce security policies, including firewalls, antivirus software, and intrusion detection/prevention systems.

- Conduct regular security audits and vulnerability assessments, addressing any identified issues.

- Manage user accounts, permissions, and access controls within Active Directory or other directory services.

- Install, configure, and update software applications and operating systems.

- Maintain detailed documentation of system configurations, procedures, and changes.

- Generate and analyze reports on system performance, security incidents, and other relevant metrics.

- Develop and maintain automation scripts for routine administrative tasks and system maintenance.

- Ensure compliance with industry standards and regulatory requirements for IT systems.

- Provide advanced technical support and troubleshooting for hardware, software, and network issues.

- Lead and mentor junior IT staff, providing guidance and training as needed.

- Collaborate with other IT teams and departments to ensure seamless service delivery and support.

- Participate in the planning and execution of IT projects, including hardware and software rollouts, system migrations, and upgrades.

- Identify opportunities for process improvements and implement solutions to enhance IT service quality and efficiency.

- Stay updated with the latest technology trends, advancements, and best practices in systems administration.

- Manage and maintain IT hardware inventory, including procurement, deployment, and asset tracking.

- Provide input and recommendations for the continuous improvement of IT infrastructure and services.

- Coordinate with vendors and service providers for issue resolution and service enhancements.

- Participate in team meetings, providing updates on system status, ongoing projects, and any relevant issues.

- Ensure effective incident response and problem management processes are in place and followed.

- Lead initiatives to enhance user adoption and effective utilization of IT tools and resources.

- Identify and mitigate risks associated with IT infrastructure and system changes.

- Ensure the proper functioning of network and server monitoring tools and respond to alerts.

- Oversee the implementation and management of cloud services and integrations with on-premises systems.

- Manage and maintain Citrix environments, including XenApp, XenDesktop, and NetScaler, ensuring high availability and performance.

- Troubleshoot and resolve issues related to Citrix infrastructure, including application delivery and user access.

- Optimize Citrix environments for performance, scalability, and user experience.

Originally posted on Himalayas

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