O
Optimal Growth Technologies
Senior Systems Administrator
Skills
LinuxProcess ImprovementCompliance
2 months ago
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Important information
Contract type:
Permanent
Location:
Johannesburg, South Africa
Work mode:
Remote
Published on:
11 August 2026
What they need
Sr. Sys Admininistrator
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.
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