Senior System and Network Administrator

About the role

We are seeking a Senior System and Network Administrator to ensure the reliability, performance, and security of our enterprise IT infrastructure. The role involves managing both physical and virtual environments, supporting Microsoft 365 services, and implementing cybersecurity controls.

Key responsibilities

• Monitor, maintain, and troubleshoot servers, virtual machines, network devices, and related infrastructure.
• Respond to escalated incidents, perform system patching, backup verification, and disaster‑recovery testing.
• Administer user accounts, permissions, and directory services across on‑premises and cloud platforms.
• Plan and execute infrastructure enhancements, including server deployments, firewall rule changes, and network reconfigurations.
• Manage Microsoft 365 services (Exchange Online, Teams, SharePoint, Entra ID) and enforce security features such as MFA and Conditional Access.
• Support implementation of NCA Essential Cybersecurity Controls, conduct logging, monitoring, and participate in internal audits.

Required profile

• Bachelor's degree in IT, Computer Science, Engineering, Cybersecurity or related field.
• Minimum 3 years of experience in system and network administration within production environments.
• Proven experience with Microsoft 365 administration and enterprise security best practices.
• Familiarity with NCA ECC requirements.

Required skills

• Windows Server Administration
• Basic Linux Administration
• VMware or Hyper‑V virtualization
• TCP/IP networking, VLANs, routing, switching, VPN technologies
• Active Directory and Microsoft Entra ID
• Microsoft 365 Administration
• Backup and disaster‑recovery solutions
• Infrastructure monitoring tools
• FortiGate firewall administration (preferred)
• Certifications: Fortinet NSE 4, Microsoft 365 Administrator (MS‑102), Cisco CCNA, CompTIA Network+ (optional)