Network Administrator III

About the role

This senior-level, enterprise-wide engineering position provides administration and lifecycle management across the organization's LAN/WAN, server, virtualization, cloud, and collaboration platforms. The role serves as a primary engineer for Windows Server environments, Active Directory, DNS/DHCP, GPO policies, file/print services, and system hardening, while also providing advanced support for Office 365 / Microsoft 365 and managing Azure cloud services.

Responsibilities

• Lead the design, implementation, optimization, and security of network infrastructure including switching, routing, VLANs, wireless, firewalls, and remote connectivity solutions
• Architect, deploy, and administer virtualization platforms (VMware) and enterprise storage, including performance tuning, resource optimization, and high-availability configurations
• Provide advanced support and engineering for Office 365 / Microsoft 365, including Exchange Online, Teams, SharePoint Online, identity integration, security compliance, and administration automation
• Manage and operate Azure cloud services, hybrid identity, conditional access, MFA, and cloud-based infrastructure components in collaboration with internal technical teams
• Support the design and enforcement of enterprise IT policies, security standards, and operational best practices across all infrastructure domains
• Participate in enterprise-wide IT initiatives involving networking, telecommunications, cloud adoption, modernization, cybersecurity, and systems transformation
• Provide escalated technical leadership for troubleshooting complex multi-layer issues across network, server, cloud, and application stacks
• Collaborate with business unit leaders and end users to solve infrastructure-related business problems and deliver stable, secure solutions
• Oversee SIP/VoIP and unified communications system configuration and support in conjunction with external vendors as needed
• Participate in disaster recovery planning and execution, including backups, replication strategies, and recovery testing for both on-prem and cloud systems
• Provide cross-site support for all EGI business units and serve as a technical escalation resource for Infrastructure Team members
• Maintain system integrity, availability, and performance through proactive monitoring, capacity planning, and analytical evaluations
• Contribute to IT roadmap planning, recommending upgrades, modernization efforts, and new technologies aligned with organizational goals
• Remain available for emergency response and critical after-hours support when required
• Perform other duties as assigned while abiding by all Ellwood policies and attendance requirements

Skills

• Expert-level knowledge of LAN/WAN engineering, switching, routing, VLANs, and advanced firewall configuration aligned with least privilege principles
• Deep understanding of Windows Server, Active Directory, and Directory Services including group policy design and identity lifecycle management
• Advanced proficiency with cloud services (Azure, Microsoft 365) including identity, security, compliance, and hybrid infrastructure
• Strong capability in virtualization technologies (VMware), SAN storage, replication, and availability architectures
• Advanced understanding of backup and disaster recovery methodologies spanning on-prem systems, cloud services, and virtual infrastructures
• Strong PowerShell/scripting ability and automation mindset for system deployment, configuration, and monitoring
• Excellent analytical and problem-solving skills, capable of leading complex troubleshooting efforts and delivering efficient solutions
• Strong organizational, communication, and project management skills, including the ability to lead initiatives across teams
• Demonstrated ability to work independently, maintain confidentiality, and operate effectively in rapidly changing environments
• Ability to travel regionally as needed

Qualifications

• Bachelor's Degree in Computer Science, Information Technology, or equivalent combination of experience and education
• Minimum seven (7) years experience in enterprise infrastructure administration across multi-site environments, including networking, servers, virtualization, cloud, and security
• Minimum five (5) years with VMware, SAN storage, and enterprise-level Microsoft technologies including Office 365 and hybrid/cloud integrations
• Experience with firewall platforms, security hardening, backup technologies, identity management, and modern cloud-based services
• Experience with Cisco Call Manager or other unified communications systems is a plus