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IT- Systems Administrator
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ISN Corporation
Bethesda, MD (In Person)
Full-Time
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Job Description
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)