BSEYLER-CORE# show identity

Branden Seyler

Network Whisperer

Network engineer who lives in the CLI. I design, build, and troubleshoot enterprise networks — from campus access layers to datacenter spines. When I'm not in production, I'm breaking things in my homelab so I don't break them at work.

Uptime: 3 Certs15 Skills

BSEYLER-CORE# show skills

Enterprise LAN/WANPalo Alto FirewallsCisco IOS/NX-OSBGP/OSPF/EIGRPVXLAN/EVPN802.1X/ISETACACS+/AAAZero TrustWireless (WLC 9800)LinuxDockerAnsibleNetwork SecurityDatacenter DesignAutomation

BSEYLER-CORE# show experience

▶

Network Engineer2026 - Present

Municipal Government

!Architect and maintain enterprise LAN/WAN infrastructure across physical, virtual, and hybrid cloud environments

!Design and implement network security policies using next-generation firewalls, VPN, and segmentation

!Manage routing, switching, and wireless systems across datacenter and distributed campus sites

!Monitor network performance and system alerts, performing root cause analysis on production incidents

!Evaluate and recommend IT solutions, contributing to RFPs and technical documentation

!Provide advanced troubleshooting and mentorship to team members on complex network issues

!Participate in on-call rotation supporting 24/7 network availability

▶

Network Engineer Intern2025 - 2026

Regional Utility / Infrastructure Org

!Maintain and support enterprise-grade switching and wireless infrastructure using Cisco Catalyst hardware

!Manage identity-based access and network segmentation using Cisco ISE with policy configuration and device profiling

!Support F5 BIG-IP load balancers and application delivery controllers, optimizing traffic distribution and availability

!Deploy centralized syslog aggregation for network devices, enabling threat detection and faster incident response

!Configure and manage Layer 2/3 networks, LAN infrastructure, and enterprise wireless systems

!Design IP addressing plans for infrastructure and endpoints, minimizing conflicts and enabling scalable growth

!Administer DNS and DHCP services across the environment

!Provide technical troubleshooting to resolve complex network issues during deployments and ongoing operations

▶

IT Network Intern2025 - 2025

Municipal Government

!Deployed and configured Cisco Catalyst series switches across multiple public safety and administrative facilities

!Collaborated with cross-departmental IT teams to maintain and optimize mission-critical networks

!Provided network support for employees across multiple departments, resolving access and connectivity issues

!Monitored network performance using packet capture and network management tools to troubleshoot issues

!Assisted in decommissioning legacy Unified Communications systems during platform migration

▶

Utiltiesman 2nd Class2014 - 2022

United States Navy

!Maintained and repaired critical infrastructure systems across naval facilities under high operational pressure

!Led preventive and corrective maintenance programs ensuring operational readiness and compliance

!Trained and supervised junior personnel on procedures, safety, and mission-critical workflows

!Planned and executed large-scale utility infrastructure projects across multiple locations

!Managed accurate parts inventory and equipment tracking, reducing job completion downtime

BSEYLER-CORE# show certifications

CCNAactive

Cisco Systems

200-301 | 2025

CCNPin progress

Cisco Systems

350-401 | 2026

ENARSIin progress

Cisco Systems

300-410 | 2026

BSEYLER-CORE# show homelab

▶

Core Infraconnected

Proxmox VE | PA-850 | Nexus 9372TX | Catalyst 3650 | 9130AXI APs

ProxmoxPAN-OSEIGRPRouted AccessDockerAD DS

Compute

!Proxmox VE 9.x multi-node cluster

!Hosts all production VMs: firewall, AD, Docker, monitoring, lab nodes

Security

!Palo Alto NGFW — zone-based architecture with inter-zone policies

!Dedicated zones; segmented server/user/lab/DMZ zones

Identity

!Windows Server 2025 — AD DS with single-domain forest

!Integrated DNS/DHCP, GPO baseline hardening

Routing

!EIGRP for internal reachability across VLANs and segments

!Planned: BGP peering at the edge — lab AS to simulate multi-homed WAN

!Planned: Route redistribution between protocols with controlled metrics

Containers

!Docker Compose stack — Nginx reverse proxy, monitoring exporters

!Portainer for container lifecycle management

▶

Network Labconnected

Cisco CML | IOSv | NX-OS | CCNP Study Environment

CMLIOSvNX-OSCCNP

Platform

!Cisco CML running as VM on Proxmox cluster

!Dedicated VLAN with routed access to management network

!Lab topologies saved as templates for quick spin-up

Routing & Switching

!Cisco IOSv — OSPF, EIGRP, BGP multi-area/multi-AS topologies

!STP tuning, HSRP/VRRP failover, EtherChannel, VTP pruning

!Route filtering with prefix-lists and route-maps

Data Center

!NX-OS — vPC peer-link design, FabricPath, VXLAN EVPN fundamentals

!Spine-leaf topology simulation for DC switching concepts

▶

Monitoringconnected

Grafana | Prometheus | SNMP Exporter | LibreNMS

GrafanaPrometheusLibreNMS

Metrics Pipeline

!Prometheus scraping node_exporter, SNMP Exporter, cAdvisor, and custom targets

!Alertmanager with routing rules — email + webhook notifications

!15s scrape interval on critical infra, 60s on lab nodes

Dashboards

!Grafana — interface utilization, BGP neighbor state, CPU/mem/thermal

!Per-device drill-down panels with variable selectors

!Templated dashboards auto-populated via Prometheus service discovery

Network Management

!LibreNMS — SNMP v3 auto-discovery across all managed devices

!Syslog aggregation with alert rules for interface flaps and auth failures

!Automatic topology mapping from LLDP/CDP neighbor data

BSEYLER-CORE# show contact

Email[email protected]reachable

LinkedInlinkedin.com/in/branden-seylerreachable

GitHubgithub.com/coffeeoverlannreachable