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Network Architect

Brendan Battersby

Network architect with 9+ years of experience designing and delivering secure, resilient enterprise networks across finance, retail, manufacturing, and service-provider environments. Proven success leading routing redesigns, hybrid Azure connectivity, SD-WAN transformations across 250+ sites, and zero trust policy for more than 2,500 endpoints.

Experience

BCI

Network Security Engineer·Oct 2023–Present

  • Built redundant hybrid Azure connectivity using VeloCloud SD-WAN NVAs and dynamic BGP routing, eliminating single points of failure.
  • Led network architecture for cloud migration, partnering with application and infrastructure teams to migrate and rearchitect numerous internal services and applications in Azure.
  • Led a routing redesign from static routes to a scalable multi-tier topology using OSPF in datacenters and eBGP across the WAN, enabling dynamic failover.
  • Developed Zscaler ZIA and ZPA policies that enforced zero trust access across more than 2,500 endpoints.
  • Led auditing and remediation of URL-filtering and lateral-movement exposure across Palo Alto and Zscaler platforms.
  • Hardened network infrastructure by assessing and remediating CIS security baselines with Tenable and Ansible.
  • Managed Palo Alto firewalls through Panorama in a complex multi-vsys environment.
  • Engineered and administered multinational infrastructure spanning Arista core, Aruba and Cisco access, and VeloCloud SD-WAN.
  • Configured and maintained Aruba and Cisco wireless infrastructure supporting 1000+ endpoints.
  • Managed Cisco ISE and Aruba ClearPass NAC policy to enforce access control and regulatory requirements.

Kal Tire

Senior Network Engineer·May 2022–Oct 2023

Network Engineer·May 2019–May 2022

  • Led five major infrastructure initiatives: core routing redesign, end-to-end QoS, SD-WAN migration, enterprise firewall replacement, and east-west traffic filtering.
  • Migrated gateway services from Layer 3 switching to Palo Alto firewalls, enforcing segmentation for more than 2,000 hosts across Azure and on-premises environments.
  • Facilitated application migrations from on-premises infrastructure to Azure without service interruption.
  • Designed and operated an international multi-vendor network across 250+ retail, mining, and warehouse sites using Cisco, Palo Alto, Fortinet, Aruba, Azure, Versa, and Ruckus.
  • Maintained PCI DSS compliance across 300+ devices spanning 250+ retail and industrial locations.
  • Designed and managed A10 application delivery services supporting thousands of daily transactions.
  • Monitored network availability and compliance with SolarWinds, Icinga, and Splunk.
  • Delivered 24/7 on-call support and resolved escalated incidents while minimizing service disruption.
  • Mentored team members and resolved hundreds of escalated service requests and incidents.

iTel Networks

Network Engineer·Jun 2017–May 2019

  • Implemented a core hardware upgrade using Cisco ASR9006 and Juniper SRX3400 platforms, increasing backbone capacity.
  • Configured and troubleshot BGP, OSPF, MPLS, L2VPN, and L3VPN services across a national carrier backbone serving hundreds of enterprise customers.
  • Managed a multi-vendor Cisco, Ciena, and Juniper core network and maintained 99.9% availability through proactive monitoring.
  • Deployed more than 100 Meraki switches, firewalls, and wireless access points across customer branches.
  • Created engineering designs and served as a sales engineer, translating customer requirements into technical solutions.
  • Administered Windows Server services and VMware ESXi environments.