Sr. Network Engineer

ADT•Irving, TX

About The Position

The Sr. Network Engineer designs, develops, documents, implements, and manages enterprise network technologies across cloud, on-premises, and hybrid environments. The role focuses on secure network design and performance across Azure, OCI, AWS, and GCP, as well as enterprise routing, switching, wireless, WAN, and SD-WAN solutions. It involves working with technologies including Cisco, Palo Alto, VMware NSX-T/AVI, and F5, including complex BGP configurations, load balancing, external DNS, and F5 GSLB, BigIP, and XC deployments. The engineer develops hybrid- and multi-cloud strategies, automates network configuration and management, maintains network performance, and troubleshoots complex connectivity issues. The role also includes documenting network designs, conducting site surveys and capacity planning, configuring high-availability and QoS solutions, collaborating with security teams, and evaluating network technologies and equipment. Minimum travel is required for conferences and/or remote site work.

Requirements

Bachelor's degree or equivalent experience in a relevant field.
CCNA, CCNP, and cloud certification.
Palo Alto certification.
8–10 years in IT network engineering roles, including LAN, wireless, WAN, SD-WAN, and routing protocol design, implementation, and troubleshooting.
Hands-on experience deploying and managing enterprise-grade wired and wireless network infrastructure, dynamic routing protocols such as OSPF and BGP, and VLAN configurations.
Expertise in secure, scalable network solutions across multi-vendor platforms, including Cisco, Meraki, Palo Alto, Juniper, and Aruba.
Extensive knowledge of hybrid-cloud networking and integration with on-premises environments.
Experience with network performance optimization, capacity planning, and high-availability configurations.
Experience implementing and managing network monitoring and troubleshooting tools such as SolarWinds, Wireshark, and Cisco DNA Center.
Familiarity with network security technologies, including firewalls, VPNs, and network access control (NAC) solutions.
Strong understanding of LAN switching, VLAN configuration, and spanning tree protocols.
Expertise in OSPF and BGP for large-scale enterprise environments.
Proficiency in WAN technologies, including IPSec, MPLS, SD-WAN, and load balancing.
Advanced knowledge of enterprise Wi-Fi design and implementation, with hands-on experience using wireless controllers and access points and troubleshooting connectivity issues.
Familiarity with network monitoring and management tools such as Wireshark and SolarWinds.
Experience in network design, high-availability configurations, and disaster recovery planning.
Strong problem-solving skills for complex network and wireless issues.
Proficiency in Python, PowerShell, or Bash for network automation.
Hands-on experience with Ansible, Terraform, or SaltStack for managing network devices.
Extensive knowledge of the F5 suite, including load balancing, VIPs, XC, and DNS.
Proficiency in the Palo Alto firewall suite, including Prisma Access and Panorama.
Understanding of F5 or similar technologies.

Responsibilities

Design, implement, and manage cloud and on-premises network technologies, focusing on security and VPC design across Azure, OCI, AWS, and GCP.
Develop strategies for hybrid-cloud and multi-cloud deployments, ensuring integration and performance.
Engineer network solutions using Cisco, Palo Alto, VMware NSX-T/AVI, and F5, including complex BGP configurations.
Configure, deploy, and troubleshoot wired and wireless LAN, WAN, and SD-WAN solutions across multi-vendor enterprise environments.
Design, implement, and optimize enterprise Wi-Fi networks for coverage, performance, and security.
Develop and maintain scripts and automation for network configuration and management.
Configure and maintain dynamic routing protocols, including BGP and OSPF.
Develop and document network designs and topologies for new deployments and infrastructure upgrades.
Conduct site surveys and capacity planning for LAN, wireless, and SD-WAN networks.
Troubleshoot complex issues involving LAN, wireless access points, SD-WAN, and routing protocols.
Monitor and optimize network performance through proactive monitoring and capacity management.
Implement QoS configurations to prioritize traffic and support critical application performance.
Design and configure high-availability solutions, including redundant links, dynamic routing, and failover mechanisms.
Collaborate with security teams to ensure Wi-Fi, LAN, and SD-WAN deployments comply with organizational security standards.
Assist in evaluating and deploying next-generation technologies, including cloud-managed network solutions.
Provide input on selection of network hardware and software, including wireless controllers, switches, routers, and SD-WAN appliances.
Manage external DNS and domain registration using industry-standard services.
Manage complex F5 GSLB, BigIP, and XC deployments.
Configure and manage Palo Alto Strata and Prisma Cloud technologies, including Panorama, firewall rules, clustering, and SD-WAN.