Senior Network Administrator

Senior Network Administrator

Location: Jacksonville, FL

Job Description

Seeking a Senior Network Administrator to lead the design, implementation, and support of enterprise network infrastructure across data centers and remote locations. This is a senior-level engineering role requiring deep expertise in Cisco, Palo Alto, and Cradlepoint technologies, with responsibility for architecture, troubleshooting, and Tier-3 escalation support.

Key Responsibilities

• Lead the design and deployment of enterprise network infrastructure across data centers, remote sites, and hybrid environments.
• Architect secure and scalable network solutions using Cisco, Palo Alto, and Cradlepoint platforms.
• Troubleshoot complex multi-layer network issues; perform root cause analysis and implement corrective actions.
• Manage and optimize VPN, IPsec, SD-WAN, remote access, and WAN failover solutions.
• Perform configuration reviews, audits, and performance optimization using network monitoring tools (SolarWinds, NetFlow, SNMP, Wireshark).
• Support high-availability data center networking, including virtualization, interconnects, and redundancy.
• Coordinate with carriers and vendors for provisioning fiber/Ethernet services and managing SLAs.
• Validate and test network hardware/software for upgrades, deployments, and security enhancements.
• Develop scripts or automation tools for monitoring, configuration, and reporting.
• Participate in structured change management processes and compliance activities.
• Provide Tier-3 support and mentor junior team members.
• Document network designs, procedures, and troubleshooting steps.
• Communicate technical issues and project updates clearly to both technical and non-technical audiences.

Required Technical Expertise

• Advanced knowledge of network architecture, design principles, routing, and hybrid environments.
• Strong hands-on experience with Cisco and Palo Alto (EIGRP, OSPF, BGP, IPsec, NAT, DNS, DHCP, Panorama, GlobalProtect, SSL Decryption, Threat Prevention).
• Experience with Cradlepoint/cellular networking (LTE/5G, WAN failover).
• Familiar with NAC, load balancing (F5, Azure App Gateway), and SD-WAN solutions.
• Understanding of voice/UC protocols: UDP, RTP, RTCP, QoS.
• Knowledge of fiber/carrier Ethernet services and vendor coordination.
• Strong troubleshooting skills using CLI, Linux, and/or PowerShell.
• Experience with distributed computing environments and network security.

Qualifications

• Bachelor’s degree: in Computer Science or related field and
• 4+ years of professional network administration experience in a large enterprise environment.
• OR
• 8+ years: of combined education, training, and hands-on experience installing, maintaining, and supporting enterprise network systems.