System Administrator Tier 3 Network

Tier 3 Systems Administrator

Location: Evansville, IN
Department: Informational Technology (IT)
Reports To: Vice President of Informational Technology

Position Summary

Lewis Bakeries is seeking a Network / Systems Administrator with approximately 5–7 years of hands-on experience supporting enterprise network and systems environments. The primary focus of this role is the administration, maintenance, and improvement of core infrastructure — networking, Microsoft 365, Windows Server, endpoint devices, and identity services — across multiple manufacturing and distribution sites.

The ideal candidate has a balanced background in network administration and systems administration, brings a proactive and security-minded approach, and serves as an escalation point in a fast-paced, multi-site environment.

This is a hands-on role that combines infrastructure responsibility with direct user support. The administrator owns and maintains core network and systems infrastructure and also works daily end-user support tickets as part of the IT team.

Key Responsibilities

Network Administration

• Design, implement, and maintain LAN, WAN, WLAN, VPN, and remote connectivity solutions across bakeries, distribution centers, and corporate locations.
• Configure, manage, and troubleshoot routers, switches, firewalls, wireless controllers, and related network hardware.
• Monitor network performance, identify bottlenecks, and optimize reliability, availability, and efficiency.
• Troubleshoot complex network issues involving routing, switching, wireless, firewalling, and security incidents.
• Assist with network security initiatives including segmentation, access control, vulnerability remediation, and incident response.
• Maintain accurate network documentation, diagrams, IP addressing, and configuration standards.
• Participate in the planning and execution of network upgrades, expansions, and modernization projects.

System and Infrastructure Administration

Owns (Primary Responsibility)

• Administer and support Microsoft 365 services including Entra ID (Azure AD), Exchange Online, SharePoint, OneDrive, Teams, and security features.
• Perform user account creation, management, and lifecycle administration across Active Directory and Microsoft 365.
• Design, implement, and maintain Group Policy Objects (GPOs) for security, configuration, and compliance.
• Deploy, manage, and maintain Windows servers (on-prem and/or virtualized), including patching, hardening, updates, and lifecycle management.

Assists with (Shared/Supporting)

• Support endpoint device deployment and management for desktops, laptops, tablets, mobile phones, and servers, including imaging, configuration, and replacement.
• Assist with endpoint security platforms such as SentinelOne, including agent deployment, policy management, alert review, and remediation in coordination with security and IT leadership.
• Assist with device management platforms (e.g., Intune, MDM/MAM, or similar) and endpoint security tooling.
• Support backup, recovery, and disaster recovery processes for systems and infrastructure.
• Troubleshoot complex OS, authentication, application, security, and endpoint issues escalated from frontline support.

End-User Support and Operational Responsibilities

• Work daily end-user support tickets and provide hands-on, day-to-day support to users.
• Troubleshoot and resolve desktop, application, authentication, device, and connectivity issues directly with end users.
• Serve as a escalation resource for IT staff across networking, systems, and security domains.
• Collaborate with vendors, service providers, and internal teams to deliver stable, scalable, and secure solutions.
• Contribute to infrastructure standards, documentation, and internal knowledge resources.
• Participate in on-call rotation and provide after-hours support for critical systems.
• Assist with audits, compliance initiatives, and security reviews as needed.