Senior Systems and Network Administrator

Job Description

Job Description

Robert Half is hiring for a Senior Systems and Network Administrator to join a client in the Providence, RI area.

This is a newly created role to support a growing pipeline of infrastructure projects. The environment is undergoing a major modernization effort after years of limited investment, including a planned migration to Microsoft Azure and the retirement of legacy virtualization.

This role is ideal for a senior, hands‑on “JOAT” infrastructure professional with strong Windows, Active Directory, and networking experience, someone comfortable owning projects end‑to‑end and partnering with an MSP during a cloud transition before assuming long‑term operational ownership.

What You’ll Do

• Lead and support infrastructure modernization projects (server, network, cloud)
• Maintain and improve on‑prem and hybrid environments
• Act as a senior escalation point for Windows, AD, and networking issues
• Support an Azure migration in partnership with an MSP and manage the environment post‑implementation
• Assist with VMware decommissioning (planned for late Q3/Q4)
• Participate in after‑hours support as needed
• Mentor team members and assist with lower‑level support when required

Windows Server & Active Directory

• Multi‑site Active Directory administration
• AD replication health and troubleshooting
• Group Policy, Certificate Authority, file services
• AD to Entra ID sync (Entra Connect / AAD Connect)
• Patch management, OS upgrades, server rebuilds

Cloud & Microsoft 365 (Preferred)

• Exposure to Microsoft Azure (infrastructure, backup, DR concepts)
• Microsoft 365 administration:
• Entra ID (Azure AD)
• Exchange Online
• SharePoint Online
• Teams

Networking & Security

• Strong Layer 2/3 networking fundamentals
• DHCP, DNS administration
• Firewall experience (Meraki preferred):
• Rules, traffic flows, site‑to‑site and client VPNs
• Cisco switching and wireless:
• VLANs, STP, VTP, IOS
• Cisco APs; 9800 WLC a strong plus

Virtualization & Databases

• VMware experience (legacy environment)
• SQL Server administration and upgrades

Automation & Tooling

• Backup and recovery platforms
• Endpoint protection / AV tools
• RMM tools
• PowerShell scripting for:
• Microsoft 365 / Entra ID / Exchange
• Windows Server automation

Preferred Background

• Prior MSP experience strongly preferred
• Linux administration experience (Red Hat or Debian‑based) a plus
• Familiarity with Copilot, AI‑driven automation, or agent‑based tools a plus