Network Engineer L-3

Coretek is seeking a Network Engineer – L3 to design, implement, support, and continuously improve enterprise network and network security environments across Azure, hybrid, and on-premises data centers for managed services clients. This role owns complex routing, switching, firewall, SD-WAN, and cloud connectivity solutions, translating business, security, and compliance requirements into resilient, secure, and supportable network architectures. The ideal candidate combines deep hands-on experience with Palo Alto and Fortinet firewalls, Azure networking, and enterprise LAN/WAN with strong troubleshooting discipline and client-facing communication. The engineer serves as the senior escalation point for network incidents, leads root cause analysis, reduces recurring issues, and drives standards, automation, and continuous improvement across the managed network estate. Key Responsibilities Azure & Hybrid Cloud Networking Design, deploy, and support Azure network architectures including hub-and-spoke, Virtual WAN, VNets, peering, UDRs, NSGs, and Private Endpoints/Private DNS. Implement and troubleshoot hybrid connectivity using site-to-site VPN, point-to-site VPN, and ExpressRoute. Configure and support Azure Firewall, Application Gateway/WAF, Azure Load Balancer, Front Door, and DNS services. Align network designs to Cloud Adoption Framework landing zone connectivity guidance and Well-Architected principles. Maintain network diagrams, IP address plans, architecture decision