Infrastructure Administrator

Jobtailor; United States; On-site; USD 70,000 - 100,000; Full time

Job summary

Jobtailor is seeking a Tier III infrastructure specialist in the United States to provide advanced server support and contribute to cybersecurity projects. You will manage Windows Server maintenance, user administration, and Microsoft 365 services such as Teams and SharePoint.

The role emphasizes hands-on administration, network engineering, and participation in security audits to remediate vulnerabilities. Experience across AD, DNS/DHCP, VLANs, and VPNs is required.

Qualifications

• Strong Windows Server background.
• Experience with Active Directory/DNS/DHCP.
• Familiarity with Group Policy.
• Knowledge in Virtualization (Hyper-V, VDI).
• Microsoft 365 administration experience.
• Networking skills including switch installation and VLAN assignments.
• Experience with firewalls and VPN support.

Responsibilities

• Provide Tier III operational support for server infrastructure.
• Assist with infrastructure projects and cybersecurity initiatives.
• Perform Windows Server maintenance and user administration.
• Manage Microsoft 365 services including Teams and SharePoint.
• Conduct security audits and vulnerability remediation.

Skills

Windows Server

Network Engineering

Active Directory

DNS

DHCP

Group Policy

Virtualization

Hyper-V

VDI

Microsoft 365 administration

Firewall & VPN

Tools

Microsoft 365

Teams

SharePoint

VPN

Hyper-V Manager

Job description

• Provide Tier III operational support for server infrastructure
• Assist with infrastructure projects and cybersecurity initiatives
• Perform Windows Server maintenance and user administration
• Manage Microsoft 365 services including Teams and SharePoint
• Conduct security audits and vulnerability remediation

Requirements

• Strong Windows Server background
• Network Engineering skills
• Experience with Active Directory/DNS/DHCP
• Familiarity with Group Policy
• Knowledge in Virtualization (Hyper-V, VDI)
• Microsoft 365 administration experience
• Networking skills including switch installation and VLAN assignments
• Experience with firewalls and VPN support

Core Competencies

Demonstrates expertise in Windows Server maintenance, Microsoft 365 administration, and network engineering, with a strong focus on cybersecurity initiatives and infrastructure project support.

Highest-signal resume keywords

• Windows Server Administration
• Microsoft 365 Management
• Network Engineering
• Active Directory Management
• Cybersecurity Initiatives

ATS Optimization Keywords

Hard Skills

• Windows Server
• Active Directory
• DNS
• DHCP
• Group Policy
• Virtualization
• Hyper-V
• VDI
• Networking
• Firewall Management

Industry Keywords

• Tier III Support
• Security Audits
• Vulnerability Remediation
• Switch Installation
• VLAN Assignments

Tools & Technologies

• Microsoft 365
• Teams
• SharePoint
• VPN