Senior Network Engineer

IP Secure, LLC•San Antonio, TX

About The Position

IPSecure is seeking a highly skilled Senior Network Engineer to support the design, implementation, administration, modernization, and sustainment of complex enterprise and data center network environments. The role requires hands-on expertise across Cisco networking technologies, Palo Alto Networks firewalls, Dell switching platforms, and multi-vendor infrastructure. The engineer will independently troubleshoot complex Layer 2 through Layer 7 issues, develop scalable network solutions, maintain secure and resilient infrastructure, and integrate network technologies across platforms. The position supports enterprise and data center networking, network security and access control, Dell networking infrastructure, and systems integration and operational support. Responsibilities include working with Cisco IOS, IOS XE, NX-OS, Catalyst, Nexus, Cisco ACI and ISE; Palo Alto PAN-OS and Panorama; Dell SmartFabric OS10 and legacy switching; and virtualized environments using VMware vSphere and ESXi. The engineer also produces technical documentation and participates in design reviews, change management, implementation planning, and infrastructure validation. The role is based at Port San Antonio in San Antonio, Texas, and requires a TS/SCI clearance.

Requirements

Advanced hands-on experience configuring, administering, upgrading, and troubleshooting Cisco IOS, IOS XE, and NX-OS.
Extensive experience with Cisco Catalyst and Nexus switching platforms.
Experience designing, deploying, and maintaining Cisco ACI fabrics using APIC controllers.
Strong understanding of spine-leaf architectures, VXLAN/EVPN, BGP, OSPF, VRFs, VLANs, vPC, and Layer 2/Layer 3 networking.
Experience with Cisco ISE, including 802.1X, RADIUS, TACACS+, and certificate-based authentication.
Ability to troubleshoot complex Cisco routing, switching, fabric, and interoperability issues across traditional and software-defined networking environments.
Experience managing Cisco operating system upgrades, configuration backups, security updates, and network migrations.
Advanced hands-on experience configuring, administering, and troubleshooting Palo Alto Networks next-generation firewalls.
Experience with Palo Alto PAN-OS 10.x or newer and Panorama centralized management.
Strong understanding of security policies, NAT, IPSec VPNs, and network segmentation.
Knowledge of network security principles, access control, PKI, and certificate-based authentication.
Hands-on experience with Dell SmartFabric OS10 switching platforms and experience administering and troubleshooting legacy Dell switching infrastructure.
Understanding of multivendor network interoperability and migration strategies.
Extensive professional experience in enterprise network engineering, administration, implementation, and troubleshooting.
Advanced understanding of TCP/IP, Layer 2/Layer 3 networking, routing, switching, and network segmentation.
Experience with BGP, OSPF, VRFs, VLANs, VXLAN, spanning-tree protocols, and link aggregation.
Demonstrated ability to diagnose and resolve complex multivendor networking issues.
Ability to work independently, evaluate technical requirements, and develop engineering solutions.
Proven technical documentation and communication skills.
TS/SCI clearance required.

Nice To Haves

Cisco CCNP Enterprise or CCNP Data Center certification.
Palo Alto Networks PCNSE certification or equivalent practical expertise.
Cisco CCIE certification.
Experience with VMware NSX and software-defined networking.
Experience supporting VMware vSphere and virtualized data center environments.
Experience with infrastructure automation using Python, Ansible, APIs, or similar technologies.
Experience supporting network modernization, technology refresh, and migration projects.
Experience working within secure enterprise, government, or systems integration laboratory environments.
Familiarity with enterprise network monitoring, configuration management, and security compliance requirements.

Responsibilities

Design, configure, deploy, maintain, and troubleshoot enterprise and data center network infrastructure.
Configure, administer, upgrade, and troubleshoot Cisco devices running IOS, IOS XE, and NX-OS, including Catalyst and Nexus platforms and spine-leaf architectures.
Design, deploy, administer, and troubleshoot Cisco ACI fabrics, including APIC controllers, endpoint groups, bridge domains, tenants, contracts, and fabric policies.
Configure and maintain BGP, OSPF, VLANs, VRFs, VXLAN/EVPN, vPC, and link aggregation technologies.
Support high-availability and redundant network architectures and resolve complex routing, switching, fabric, and interoperability issues.
Manage Cisco operating system upgrades, configuration backups, security updates, network migrations, infrastructure upgrades, equipment replacements, and technology refresh activities.
Configure, administer, maintain, and troubleshoot Palo Alto Networks next-generation firewalls running PAN-OS 10.x or newer.
Manage Palo Alto firewalls through Panorama, including templates, device groups, centralized policies, and software updates.
Configure and troubleshoot security policies, NAT, IPSec VPNs, GlobalProtect, and high-availability firewall configurations.
Implement network segmentation and enforce security policies across enterprise and data center environments.
Deploy, configure, administer, and troubleshoot Cisco ISE for network access control, including 802.1X, RADIUS, TACACS+, certificate-based authentication, and endpoint authorization.
Troubleshoot authentication, authorization, and network access issues across wired network infrastructure.
Configure, administer, and troubleshoot Dell SmartFabric OS10 switches and support legacy Dell switching platforms and operating systems.
Maintain interoperability between Dell and Cisco networking environments and plan and execute migrations from legacy switching to modern network architectures.
Troubleshoot Layer 2 and Layer 3 connectivity, spanning-tree, routing, VLAN, and interoperability issues.
Support network connectivity and integration with VMware vSphere, ESXi, distributed virtual switches, and virtualized infrastructure.
Collaborate with systems, cybersecurity, infrastructure, and engineering teams to implement integrated technical solutions.
Conduct root-cause analysis and resolve network performance, connectivity, and availability issues.
Use Wireshark, packet captures, logging, and network monitoring systems for analysis and troubleshooting.
Develop and maintain network diagrams, configuration baselines, standard operating procedures, and engineering documentation.
Participate in technical design reviews, change management, implementation planning, and infrastructure validation testing.