Senior Systems Engineer (L3 - Network-Focused)
About the role
The Senior Systems Engineer (L3 - Network-Focused) at GXA is a senior escalation engineer responsible for resolving complex technical issues across a managed services provider (MSP) environment. The role emphasizes deep expertise in networking, firewalls, and infrastructure, but also requires broad experience across servers, cloud services, identity, endpoint management, and business applications. The engineer acts as the primary escalation point for the most challenging service issues, working closely with L1/L2 engineers, service leadership, and project teams to troubleshoot advanced issues, improve standards, and ensure stable client environments. Key responsibilities include advanced technical execution, infrastructure and networking specialization, and driving operational efficiency by resolving complex tickets, reducing recurring escalations, and mentoring junior engineers. The position is critical to strengthening GXA's technical core and supporting scalable growth.
Must have
- Senior-level MSP support experience with the ability to independently resolve complex tickets across multiple technology domains
- Proven experience working as an L3 or senior escalation engineer in a managed services environment
- Strong, hands-on experience supporting core MSP platforms, including: Microsoft 365 and Azure (identity, access, core services); Active Directory, Exchange, and identity-related troubleshooting; Windows Server and common server roles; Virtualization platforms (VMware, Hyper-V, or equivalent); Endpoint management and standard MSP tooling (RMM, PSA, backup, security tools)
- Demonstrated ability to own tickets end-to-end, perform root cause analysis, and implement permanent fixes
- Solid practical networking experience, including: Firewall configuration and troubleshooting; VLANs, routing, switching, VPNs, and subnetting
- Strong documentation and communication skills, with the ability to clearly explain technical issues to both technical teams and non-technical stakeholders
Nice to have
- Deep expertise in networking and firewalls within MSP client environments
- Hands-on experience with firewall platforms such as Fortinet, SonicWall, Meraki, or similar
- Experience designing or remediating complex or problematic client networks
- Background supporting hybrid cloud environments and network-integrated cloud services
- Experience mentoring or upskilling L1/L2 engineers through documentation, shadowing, or technical guidance
- Familiarity with automation, scripting, or process improvement initiatives in an MSP
- Experience working in organizations leveraging offshore or distributed service teams
Technologies
- Active Directory
- Azure
- Firewall
- Fortinet
- Hyper-V
- Microsoft 365
- Virtualization
- VLAN
- VMware
- VPN
- Windows
- Windows Server
Highlights
No specific location, remote, or visa requirements are mentioned. The listing does not specify salary, benefits, or application method. The role is positioned as critical to GXA's growth and service efficiency.
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