Senior Network Engineer

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

About CornerStone TTS

CornerStone TTS connects highly specialized technology professionals with meaningful opportunities at established enterprise organizations. Our recruiting team understands the technical demands of infrastructure and network engineering roles, allowing us to align candidates with opportunities that match their experience, technical strengths, and career goals. We provide:

• Access to complex enterprise technology environments
• Clear and consistent communication throughout the hiring process
• Opportunities to work with modern networking, security, and application-delivery technologies
• A recruiting partnership focused on long-term professional success

Responsibilities

• 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.

Requirements

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
• Palo Alto Network Security
  • PAN-OS administration
  • 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
  • F5 BIG-IP LTM
  • F5 BIG-IP DNS/GTM
  • 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
  • Aruba ClearPass Policy Manager
  • 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

Qualifications

• 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

• Cisco CCIE, CCNP Enterprise, or CCNP Security
• Palo Alto Networks PCNSE
• F5 Certified Technology Specialist
• Aruba Certified Mobility Professional
• Aruba Certified ClearPass Professional
• Equivalent advanced certifications and substantial hands-on experience will also be considered.

Schedule

• Full-time schedule 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.