IT- Systems Administrator at ISN

ISN is seeking a senior-level IT System Administrator to support and maintain its IT infrastructure. The role administers Windows servers, Active Directory, DNS, DHCP, Group Policy, switches, firewalls, VPNs, wireless networks, VoIP systems, NAS/SAN storage, Microsoft 365, Azure AD/Entra ID, Teams, and SharePoint, while providing Tier 3 support and handling complex technical escalations. The position requires 8–10 years of system or network administration experience, strong expertise in Windows Server, Microsoft 365, and core networking, and hands-on experience with VoIP systems and network storage appliances.