<p><strong>Systems Administrator (Hybrid)</strong></p><p><br></p><p><strong>Position Overview</strong></p><p>We're looking for a Systems Administrator to join a collaborative IT team responsible for supporting and modernizing a hybrid Microsoft infrastructure. This role combines day-to-day systems administration with infrastructure projects, cloud migration initiatives, and Tier 3 support. The ideal candidate enjoys solving technical challenges, improving system reliability, and helping drive a cloud-first strategy.</p><p><br></p><p><strong>Responsibilities</strong></p><ul><li>Administer Microsoft 365 services including Exchange Online, Teams, SharePoint, and OneDrive.</li><li>Manage Entra ID (Azure Active Directory), hybrid identity, and user access.</li><li>Support Windows server infrastructure in both physical and virtual environments.</li><li>Maintain VMware and/or Hyper-V virtualization platforms.</li><li>Assist with the migration of on-premises infrastructure and workloads to Microsoft Azure.</li><li>Configure and support Microsoft Teams Phone, including call routing and policies.</li><li>Manage networking infrastructure including switches, wireless access points, and firewalls.</li><li>Implement security best practices including MFA, Conditional Access, and identity management.</li><li>Monitor infrastructure health, system performance, backups, and disaster recovery.</li><li>Troubleshoot complex infrastructure issues and serve as a Tier 3 escalation resource.</li><li>Develop and maintain technical documentation and standard operating procedures.</li><li>Collaborate with IT team members on infrastructure improvements and strategic initiatives.</li><li>Provide occasional support for Tier 1 and Tier 2 issues while mentoring junior IT staff.</li></ul>
<p>Robert Half is partnering with our client in the Janesville area to hire an experienced Senior Systems Administrator to support and enhance a complex enterprise IT infrastructure. This is a hands-on senior-level role responsible for maintaining highly available server, cloud, storage, and network environments while serving as the primary escalation point for complex infrastructure issues. The ideal candidate brings deep Microsoft infrastructure expertise, strong networking experience, and a proactive approach to system reliability, security, and continuous improvement.</p><p><br></p><p><strong>Responsibilities</strong></p><ul><li>Administer, maintain, and optimize enterprise Windows Server environments, ensuring high availability, performance, and security.</li><li>Manage Hyper-V virtualization infrastructure and support server lifecycle activities including deployments, upgrades, patching, and performance tuning.</li><li>Administer Microsoft 365 services including Exchange Online, Teams, SharePoint, and related cloud technologies.</li><li>Manage Azure infrastructure, subscriptions, identity services, and cloud resources.</li><li>Maintain Active Directory, Group Policy, DNS, DHCP, and identity management services.</li><li>Support enterprise storage infrastructure, including SAN environments and backup technologies.</li><li>Configure, manage, and troubleshoot enterprise networking components including firewalls, switches, wireless networks, VPNs, and WAN connectivity.</li><li>Administer Cisco Firepower and SonicWall firewalls, including security policies, VPN configuration, NAT, content filtering, and threat prevention.</li><li>Manage Aruba switching infrastructure, VLANs, routing, network segmentation, and wireless environments utilizing Aruba and Ubiquiti technologies.</li><li>Monitor infrastructure health, identify trends, and proactively resolve issues before they impact business operations.</li><li>Lead troubleshooting efforts for complex infrastructure incidents and perform root cause analysis.</li><li>Participate in infrastructure projects including migrations, upgrades, cloud initiatives, and technology implementations.</li><li>Develop and maintain technical documentation, network diagrams, operational procedures, and configuration standards.</li><li>Partner with security teams to implement infrastructure security best practices and remediation efforts.</li><li>Identify opportunities to automate administrative tasks using PowerShell and other automation tools.</li><li>Mentor junior team members and provide technical leadership on infrastructure initiatives.</li></ul><p><br></p>