Companies CallTek Level 3 (L3) Network Technical Support Engineer

About the role

CallTek · Remote

About the Role

We are seeking a highly skilled Level 3 (L3) Technical Support Engineer with deep expertise in network infrastructure and hospitality environments. This role serves as the highest level of escalation for complex network-related issues, including advanced troubleshooting, configuration, and optimization of wired and wireless systems.

The ideal candidate is a hands-on technical expert with strong experience in switching, routing, firewalls, and wireless networks, capable of working across multi-vendor environments and ensuring reliable, high-performance connectivity.

Key Responsibilities

Advanced Network Troubleshooting

  • Diagnose and resolve complex issues related to network infrastructure, including LAN/WAN, Wi-Fi, and security systems.
  • Handle escalations involving VLANs, routing, switching, firewall rules, and network segmentation.
  • Troubleshoot performance issues, packet loss, latency, and connectivity disruptions.

Configuration & Implementation

  • Configure and maintain network devices, including switches, wireless access points, and firewalls.
  • Perform advanced configurations such as VLAN setup, trunking, ACLs, QoS, and firewall policies.
  • Support headend equipment configuration and optimization.

Multi-Vendor Network Support

  • Provide expert-level support for:
    • MikroTik (routing, firewall, scripting)
    • Aruba Networks
    • Ruckus Wireless
    • Cambium Networks
    • Fortinet (switches & firewalls)
  • Ensure interoperability and optimal performance across diverse platforms.

Root Cause Analysis

  • Perform deep technical analysis to identify root causes of recurring network issues.
  • Implement long-term fixes and improvements to enhance network stability and performance.

Hospitality Network Expertise

  • Support and optimize hospitality network environments, including guest and staff networks.
  • Manage walled garden configurations, ensuring proper access for guest onboarding portals.
  • Implement and maintain ACLs (Access Control Lists) for secure network segmentation.

Monitoring & Proactive Support

  • Monitor network health, performance, and security.
  • Proactively identify risks and prevent potential outages or service degradation.

Escalation & Vendor Coordination

  • Act as the final escalation point for unresolved L1/L2 issues.
  • Coordinate with vendors and third-party providers for advanced troubleshooting and resolution.

Documentation & Knowledge Sharing

  • Maintain detailed technical documentation, network diagrams, and troubleshooting guides.
  • Mentor L1 and L2 engineers and enhance team knowledge around network best practices.

Process Improvement

  • Evaluate support workflows and recommend improvements.
  • Drive automation and efficiency initiatives in network operations.

Requirements

Qualifications & Requirements

  • 5+ years of experience in network support or network engineering, with at least 2 years in an L3 or senior role.
  • Strong hands-on expertise in:
    • VLANs, ACLs, routing, switching, NAT, and firewall policies
    • Wireless network design and troubleshooting
  • Proven experience working with:
    • MikroTik
    • Aruba, Ruckus, Cambium
    • Fortinet switches and firewalls
  • Experience supporting hospitality or high-density guest network environments.
  • Familiarity with walled garden configurations and captive portals.
  • Strong troubleshooting, analytical, and problem-solving skills.
  • Excellent communication skills for customer and cross-team collaboration.

Preferred Qualifications

  • Certifications such as CCNP, Fortinet NSE, Aruba ACMP/ACSP, Ruckus, Meraki or MikroTik MTCNA/MTCRE.
  • Knowledge of network monitoring tools (e.g., PRTG, SolarWinds, or similar)
  • Knowledge of scripting/automation (e.g., Python, Bash)
  • Understanding of ITIL processes and incident management
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