Senior Network Engineer — Managed Services

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Job Overview

The Senior Network Engineer (L3) is a senior technical resource within the Managed Services organization responsible for supporting, maintaining, troubleshooting, and optimizing enterprise network and security environments. This role serves as a key escalation point for complex incidents, major outages, infrastructure changes, and project implementations while ensuring the availability, performance, and security of customer networks.


The ideal candidate must possess strong hands-on experience in enterprise routing and switching (BGP, OSPF, MPLS, LAN/WAN, VLANs, STP, HSRP/VRRP, and SD-WAN) together with advanced administration and troubleshooting expertise across Palo Alto (PAN-OS, Panorama, GlobalProtect), Fortinet (FortiGate, FortiManager, FortiAnalyzer), and Cisco Secure Firewall platforms (FTD/FMC) . The role requires a strong operational mindset with ownership of incidents, root cause analysis, change implementations, and continuous service improvement initiatives.
Key Responsibilities

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Incident Lifecycle Ownership: Own the full lifecycle of complex network and firewall incidents — from detection through resolution and post-incident review — ensuring accountability for technical outcomes, stability, and documentation.

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Critical Incident Leadership: Lead investigation and resolution of critical network incidents, driving coordination across internal teams, vendors, and customer stakeholders.

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End-to-End Technical Ownership: Make technical decisions and take end-to-end ownership of network issues, driving resolution without reliance on further escalation.

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Project Delivery: Lead technical delivery of network projects, including scoping, estimation, design, and implementation.

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Root Cause Analysis: Perform root cause analysis and develop long-term remediation strategies to prevent recurrence of network issues.

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Change Validation: Validate and approve network changes, designs, and remediation strategies to ensure quality and compliance.

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Infrastructure Management: Configure, maintain, and troubleshoot Cisco, Palo Alto, and Fortinet networking and firewall equipment.

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Environment Optimization: Conduct targeted cleanup and improvements of existing network environments to ensure stability and scalability, minimizing customer downtime.

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Security Collaboration: Collaborate with the security team to ensure proper network hardening is in place and that all risks are properly mitigated or remediated.

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Mentorship: Provide technical guidance and mentorship to junior engineers.

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Documentation: Contribute to architecture documentation, diagrams, and operational runbooks.

Qualifications

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Education: A degree or equivalent experience in Computer Science or a related field.

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Experience: 10+ years of experience within an MSP, VAR, ISP, NOC, or enterprise IT environment, with a strong focus on troubleshooting and maintaining multi-client network infrastructure.

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Firewall Platforms: Advanced, hands-on experience managing enterprise firewalls across all three of the following: Cisco FTD/FMC , Palo Alto Networks PAN-OS/Panorama , Fortinet FortiGate/FortiManager

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Routing & Switching: Strong, demonstrable troubleshooting depth in TCP/IP, OSPF, BGP, EIGRP, IPSec, SNMP, STP, VTP, and VLANs — with the ability to describe specific production issues diagnosed and re