Senior Systems and Network Administrator

The Senior Systems Administrator / Network Administrator plays a critical role in modernizing and operating the company’s infrastructure. This individual will be a hands-on technical leader, responsible for designing, upgrading, and maintaining server, cloud, and network environments across multiple sites.

You will be a key influencer in infrastructure standards, policies, and procedures, while also mentoring junior team members and serving as an escalation point for complex issues.

Key Responsibilities

• Lead and execute infrastructure modernization initiatives, including server upgrades, cloud adoption, and network improvements
• Design, maintain, and troubleshoot hybrid cloud and on-prem environments
• Serve as a technical authority for systems, networking, and security best practices
• Participate in after-hours incident response and serve as an escalation resource when required
• Mentor junior administrators and provide guidance on troubleshooting and design decisions
• Assist with Level 1 help desk coverage when necessary to support team operation.

Cloud & Microsoft 365 Experience

• Strong experience with Microsoft Azure, including:
  • Azure infrastructure and core services
  • Azure Backup
  • Cross-region disaster recovery and resilience planning
• Microsoft 365 administration, including:
  • Entra ID (Azure AD)
  • Exchange Online
  • SharePoint Online
  • Microsoft Teams

Networking & Security

• Solid understanding of Layer 2 and Layer 3 networking concepts
• Experience administering:
  • DHCP servers
  • DNS servers
• Meraki Firewall experience:
  • Firewall rules and traffic flows
  • Site-to-site VPNs
  • Client VPN configurations
• Cisco switching and wireless:
  • Thorough understanding of VLANs, VTP, STP, and Cisco IOS
  • Experience with Cisco wireless access points
  • Experience with Cisco 9800 Wireless LAN Controllers strongly preferred

Windows Server & Core Infrastructure

• Extensive Windows Server administration experience, including:
  • Multi-site Active Directory environments
  • Monitoring and ensuring AD replication health
  • AD to Entra ID synchronization (Entra Connect / AAD Connect)
  • Certificate Authority administration
  • File server management
  • Patch management
  • In-place OS upgrades and full server rebuilds

Databases & Virtualization

• SQL Server experience:
  • Administration and maintenance
  • Version upgrades

Automation, Backup & Security Tools

• Hands-on experience with:
  • Backup solutions
  • Antivirus / endpoint protection platforms
  • RMM tools
• PowerShell scripting required, including automation for:
  • Microsoft 365 / Entra ID / Exchange Online
  • Windows Server administration