Senior Network Engineer

CornerStone Technology Talent Services; Fort Worth (TX); On-site; USD 110,000 - 160,000; Full time

Job summary

CornerStone TTS is seeking an accomplished Senior Network Engineer for a long-term contract, supporting a complex, enterprise-scale network environment in Fort Worth, TX. This hands-on role covers data center, campus, branch, wireless, and remote-access networks across Cisco, Palo Alto, F5, Aruba, Meraki, and Cradlepoint tech.

You will lead troubleshooting and design efforts while mentoring teams. The ideal candidate has 5+ years of hands-on configuration and troubleshooting experience, strong

Qualifications

• Extensive hands-on experience with multi-vendor enterprise networks.
• 5+ years of recent hands-on configuration and troubleshooting in core technologies.
• Ability to independently resolve complex network incidents.
• Strong understanding of security, segmentation, resiliency and high-availability.
• Experience supporting production environments with uptime and change control discipline.

Responsibilities

• Design, configure, maintain, and optimize enterprise routing and switching.
• Support campus, data center, and branch networks with VLANs, trunking, STP, and routing.
• Manage Cisco Meraki dashboards for SD‑WAN and edge connectivity.
• Configure Palo Alto firewalls, NAT, SSL decryption and segmentation.
• Support F5 BIG-IP LTM, GTM, and SSL certificates for application delivery.
• Deploy Aruba wireless, including controllers, APs, authentication, roaming.
• Develop network access-control policies with Aruba ClearPass (802.1X).
• Manage Cradlepoint cellular connectivity and NetCloud Manager.
• Lead advanced troubleshooting across routing, switching, firewalls, VPNs, and latency.
• Create and maintain diagrams, standards, procedures, and knowledge materials.
• Serve as Tier 3 escalation and guide cross-functional teams.

Skills

Cisco Routing

Nexus Switching

Firewall Configs

VPN / Remote Access

Load Balancing

Wireless Networks

Network Security

Troubleshooting Skills

Documentation

Multi-Vendor Experience

Education

Relevant Network Certifications

Tools

Aruba ClearPass

Meraki Dashboard

Cradlepoint NetCloud

Palo Alto Firewall Management

F5 BIG-IP

Job description

Onsite in Fort Worth, TX

CornerStone TTS is seeking an accomplished Senior Network Engineer for a long-term contract opportunity supporting a complex, enterprise-scale network environment.

This position is ideal for a hands-on infrastructure professional who can design, secure, troubleshoot, and optimize mission-critical networks across data center, campus, branch, wireless, and remote-access environments. The selected engineer will serve as a senior technical resource and Tier 3 escalation point, working across Cisco, Palo Alto, F5, Aruba, Meraki, and Cradlepoint technologies.

What You’ll Do

• Design, configure, maintain, and optimize enterprise routing and switching environments using Cisco Catalyst and Nexus platforms.
• Support highly available campus, data center, and branch network architectures, including VLANs, trunking, spanning tree, dynamic routing, redundancy, and failover.
• Manage software-defined branch and edge connectivity through the Cisco Meraki dashboard.
• Configure and administer Palo Alto firewalls, including security policies, NAT rules, application controls, threat-prevention profiles, URL filtering, SSL decryption, and network segmentation.
• Support F5 BIG-IP infrastructure, including Local Traffic Manager, Global Traffic Manager/DNS, virtual servers, pools, health monitors, traffic profiles, SSL certificates, and secure remote-access VPN services.
• Deploy, administer, and troubleshoot Aruba enterprise wireless environments, including wireless controllers, access points, authentication, roaming, RF performance, and guest access.
• Develop and maintain network access-control policies through Aruba ClearPass, including 802.1X authentication, role-based access, device profiling, guest access, and posture enforcement.
• Manage Cradlepoint cellular connectivity and NetCloud Manager environments supporting primary, backup, and failover WAN services.
• Lead advanced troubleshooting efforts involving routing, switching, firewalls, load balancing, wireless connectivity, authentication, VPN access, latency, packet loss, and application availability.
• Analyze network traffic and system behavior using packet captures, logs, monitoring platforms, and vendor diagnostic tools.
• Participate in infrastructure upgrades, hardware refreshes, migrations, change-management activities, and network-resiliency initiatives.
• Create and maintain network diagrams, configuration standards, operating procedures, troubleshooting documentation, and knowledge-transfer materials.
• Serve as a Tier 3 escalation resource and provide technical guidance to network operations, infrastructure, security, and application teams.

Required Technical Experience

The strongest candidates will offer extensive hands-on experience across several of the following areas:

Cisco Routing and Switching

• Cisco Catalyst and Nexus switching platforms
• Layer 2 and Layer 3 networking
• BGP, OSPF, EIGRP, and static routing
• VLANs, VTP, trunking, STP, RSTP, and MST
• HSRP, VRRP, port channels, and high-availability design
• Access-control lists, QoS, multicast, and network segmentation
• Security and application-based policies
• NAT and policy-based forwarding
• Threat-prevention and security profiles
• SSL decryption and certificate management
• High-availability firewall configurations
• Firewall policy review, auditing, and optimization

F5 Application Delivery

• Virtual servers, pools, nodes, monitors, and profiles
• SSL offloading and certificate administration
• Load-balancing methods and persistence
• Traffic management and application availability
• F5 remote-access or VPN technologies
• iRules or traffic-policy experience is highly valued

Aruba Wireless and Network Access Control

• Aruba wireless controllers and access points
• 802.1X, RADIUS, TACACS+, and certificate-based authentication
• Role-based access and dynamic segmentation
• Device profiling, onboarding, and guest-access workflows
• Wireless troubleshooting and RF optimization

Branch and Cellular Networking

• Cisco Meraki MX, MS, or MR administration
• Meraki Auto VPN, SD-WAN, monitoring, and dashboard management
• Cradlepoint routers and NetCloud Manager
• LTE or 5G primary and failover connectivity

What Makes You an Ideal Candidate

• Extensive enterprise network engineering experience, preferably within large, distributed, or highly regulated environments.
• At least five years of recent hands-on configuration and troubleshooting experience with several of the core technologies listed above.
• Demonstrated ability to independently resolve complex, multi-vendor network incidents.
• Strong understanding of network security, segmentation, resiliency, redundancy, and high-availability architecture.
• Experience supporting production environments where uptime, change control, documentation, and operational discipline are critical.
• Ability to communicate technical issues clearly to engineers, business partners, vendors, and leadership.
• A proactive approach to identifying performance, security, capacity, and reliability improvements.

Preferred Certifications

One or more of the following certifications are strongly preferred:

• Aruba Certified Mobility Professional
• Equivalent advanced certifications and substantial hands‑on experience will also be considered.
• Long-term contract opportunity with potential for extension
• Monday through Friday during standard business hours

CornerStone TTS welcomes experienced network professionals who are ready to take ownership of complex infrastructure, lead advanced troubleshooting efforts, and contribute to the reliability and security of a large-scale enterprise network.