System Administrator Tier 3 Network

Tier 3 Network / Systems Administrator

Lewis Bakeries is seeking a skilled and motivated Tier 3 Network / Systems Administrator to support and enhance our enterprise network and systems infrastructure. This senior technical role is responsible for designing, maintaining, and improving core IT environments across multiple bakery, distribution, and corporate locations.

The ideal candidate brings a balanced background in network and systems administration, a proactive and security-focused mindset, and the ability to serve as a Tier 3 escalation resource in a fast-paced manufacturing environment. While this role focuses on infrastructure and architecture, collaboration and hands-on support are essential to maintaining a reliable and responsive IT organization.

Responsibilities

Network Administration

• Design, implement, and maintain LAN, WAN, WLAN, VPN, and remote connectivity solutions

• Configure, manage, and troubleshoot routers, switches, firewalls, wireless systems, and related hardware

• Monitor network performance and optimize reliability and availability

• Troubleshoot complex routing, switching, wireless, and security incidents

• Support network security initiatives including segmentation and access controls

• Maintain network documentation, diagrams, and configuration standards

• Participate in network upgrades and modernization projects

Systems & Infrastructure Administration

• Administer Microsoft 365 services including Entra ID, Exchange Online, SharePoint, OneDrive, and Teams

• Manage user accounts across Active Directory and Microsoft 365

• Design and maintain Group Policy Objects (GPOs)

• Deploy and maintain Windows servers (on-prem and virtualized)

• Support endpoint deployment and lifecycle management

• Administer endpoint security platforms such as SentinelOne

• Assist with device management platforms including Intune and MDM solutions

• Support backup, recovery, and disaster recovery processes

• Resolve complex operating system, authentication, and application issues

General & Operational Responsibilities

• Serve as a Tier 3 escalation resource for networking, systems, and security issues

• Provide hands-on end-user support during peak periods or critical incidents

• Collaborate with vendors and internal teams

• Maintain infrastructure documentation and best practices

• Participate in on-call rotation and after-hours support

• Assist with audits and security reviews