We are seeking an experienced Senior Network Engineer to lead, design, secure, and optimize mission critical network infrastructure in a hybrid cloud/on-premises environment supporting DoW operations. This role requires deep expertise in enterprise networking, advanced security controls, data center architectures, network automation, and compliance-driven environments. You will serve as a technical subject-matter expert, mentor junior engineers, and drive modernization initiatives across a high security, air gapped enterprise. This position is 100% on-site in Tampa, FL and will require up to 25% travel OCONUS.

Responsibilities

Engineering

• Architect, design, and maintain advanced Layer 2/Layer 3 network infrastructures across campus, data center, and hybrid cloud environments. 
• Lead deployment and lifecycle management for Cisco Catalyst 9300/9500 platforms, Cisco Nexus/NX OS switching, and network segmentation strategies. 
• Own routing design, traffic engineering, IP schema development, and network resilience planning. • Lead modernization initiatives, including migration toward data center–optimized or leaf-spine architectures. 

Authentication & Access Control

• Architect and administer enterprise 802.1X authentication using Cisco ISE. 
• Design and maintain TACACS+, RADIUS, AD/LDAP integrations, and secure access frameworks. 
• Implement dynamic VLAN assignment, machine/user authentication policies, and enterprise access control standards. Infrastructure Integration 
• Lead networking design and integration for VMware ESXi/vCenter environments. 
• Oversee multi-tier connectivity for applications, storage, and virtual infrastructure. 
• Troubleshoot complex service dependencies across network, virtualization, and system layers. 

Security, Compliance & Hardening

• Ensure network compliance with STIGs, RMF controls, FIPS requirements, and DoD cybersecurity mandates. 
• Enforce advanced security protections including DAI, DHCP snooping, port security, and encrypted management access. 
• Maintain secure boundary architectures and validate controlled ingress/egress paths. Monitoring, Performance & Troubleshooting 
• Integrate network platforms with SIEM and monitoring stacks (Elastic, Zabbix, SolarWinds). 
• Lead advanced troubleshooting using packet captures, traffic analysis, authentication logs, and performance metrics. 
• Proactively optimize network performance, capacity, and availability. 

Change Management & Operations

• Lead network upgrades (IOS-XE, NX-OS), patching, and failover planning. 
• Oversee and enforce change management (CAB) processes. 
• Maintain and review architecture documentation, topology diagrams, and configuration baselines. 

Disaster Recovery & Continuity

• Architect and validate network support for enterprise backup, continuity, and DR operations. 
• Ensure redundant paths, failover configurations, and restoration workflows. 

Collaboration & Leadership

• Serve as a senior technical advisor to engineering, cybersecurity, cloud, and application teams. 
• Provide mentorship, code review, and technical oversight for junior and mid-level engineers. 
• Support architectural planning and provide impact analysis for new system initiatives. 

Qualifications 

• Bachelor’s degree in Computer Science, IT, Engineering, or 4 years of equivalent experience. 
• 5 years of professional network engineering experience in enterprise or DoW environments. 
• Expert-level knowledge of TCP/IP, VLANs, routing, switching, subnetting, ACLs, and segmentation. 
• Hands-on expertise with Cisco enterprise gear (Catalyst, Nexus, ISE, TACACS+). 
• Strong experience with network security architectures and cyber-compliance
• Work is 100% onsite in Tampa, FL with up to 25% travel OCCONUS

Clearance

• An active TS/SCI clearance is required