System Administrator (Part-time)

We are seeking a skilled System Administrator to join our team part-time and oversee the smooth operation of IT infrastructure, ensuring the satisfaction of our clients. The ideal candidate will have a strong background in system administration with expertise in various operating systems, virtualization, networking, email services, web server management, security, and backups.

Requirements:

• Strong understanding and at least 3 years of experience with Windows and Linux operating systems.
• Proficiency in virtualization technologies such as VMware, Hyper-V, or Proxmox.
• Basic networking skills including configuration of routers and switches, understanding of VLANs, and network services like DHCP and DNS.
• Experience with Cisco equipment.
• Hands-on experience with email servers, particularly Postfix, including configuration and management of SMTP, IMAP/POP3, and SSL/TLS.
• Experience managing web servers (Apache/Nginx) with knowledge of virtual hosts, SSL setup, and server security.
• Understanding of network and data security practices, along with experience in implementing backup solutions and disaster recovery plans.
• Intermediate English skills.
• Strong communication skills and ability to multitask.
• Flexibility to adapt to changing project requirements.

Responsibilities:

• Manage both Windows (especially Windows Server environments) and Linux systems. Perform system administration tasks including Active Directory, DHCP, DNS for Windows, and command-line operations for Linux.
• Deploy and manage virtual machines using technologies such as VMware, Hyper-V, or Proxmox.
• Configure routers and switches, set up VLANs, and manage network services like DHCP and DNS. 
• Maintain email servers, particularly Postfix, and manage SMTP, IMAP/POP3, and SSL/TLS configurations.
• Administer web servers (Apache/Nginx) ensuring optimal performance, security, and accessibility. This includes managing virtual hosts, SSL setup, and implementing security measures.
• Implement security measures to protect data and infrastructure. Establish and execute backup solutions and disaster recovery plans.
• Update and maintain all operating systems and software to ensure security and efficiency.
• Oversee and manage the corporate network infrastructure to ensure reliable connectivity and performance. This includes configuring network devices, monitoring network health, and troubleshooting connectivity issues.
• Administer and manage virtualized environments, including VM deployment, resource allocation, and performance monitoring.
• Maintain the organization’s email infrastructure, manage email accounts, configurations, and assist in troubleshooting email services.
• Manage web server configurations to ensure websites are accessible, secure, and performing optimally. This includes setting up virtual hosts, SSL certificates, and implementing security measures.
• Implement and maintain security measures to protect data and infrastructure from cyber threats. Conduct regular security audits and coordinate response strategies for security incidents.
• Execute regular backup procedures and test disaster recovery plans to ensure data integrity and availability in emergency situations.
• Provide technical support to users, addressing system, software, and networking issues.
• Recommend and implement technology solutions aligned with organizational goals.
• Participate in meetings on demand.