What are the responsibilities and job description for the IT- Systems Administrator position at ISN?
Job Title: IT System Administrator
Overview:
We are seeking a senior-level IT System Administrator with 8–10 years of experience to support
and maintain our IT infrastructure. This role manages servers, networks, Microsoft 365, voice
systems, and network storage appliances while providing advanced technical support.
Key Responsibilities:
- Administer Windows servers, Active Directory, DNS, DHCP, and Group Policy.
- Support switches, firewalls, VPNs, and wireless networks.
- Configure and troubleshoot VoIP phones, call routing, and SIP/hosted voice systems.
- Maintain NAS/SAN storage appliances and shared drive environments.
- Manage Microsoft 365, Azure AD/Entra ID, Teams, and SharePoint.
- Provide Tier 3 support and handle complex technical escalations.
- Monitor backups, system performance, security patches, and updates.
- Maintain documentation, SOPs, and asset inventory.
Requirements:
- 8–10 years of experience in system/network administration.
- Strong expertise in Windows Server, Microsoft 365, and core networking.
- Hands-on experience with VoIP systems and network storage appliances.
- Strong understanding of security best practices and patch management.
- Ability to work independently and manage multiple priorities.
Preferred Skills:
- VMware/Hyper-V experience
- PowerShell scripting
- Experience in compliance environments (NIST 800-171, CMMC)
- Certifications: Security , Network , Azure Administrator, CCNA, or similar
Summary:
This role ensures stable IT operations, secure infrastructure, and advanced support across the
organization. Ideal for a seasoned administrator with broad hands-on experience.