Senior Mainframe Network Engineer at Plano, TX/Charlotte, NC/Jersey city, NJ

Job Title: Senior Mainframe Network Engineer Location: Plano, TX/ Charlotte, NC/ Jersey City, NJ (Hybrid 3 Days onsite every week)Job Description Engineers and operates network solutions supporting mainframe TCP/IP and SNA/APPN-based system integrations. Optimizes high-availability connectivity for business-critical, high-velocity transactions and batch-processing systems. Leads modernization of mainframe network architectures, including improvements in observability and telemetry. Advances automation and AI-assisted operations to reduce manual effort, improve consistency, and enhance network reliability. Diagnoses and resolves complex issues across routing, switching, firewalls, load balancers, and mainframe network stacks. Continuously improves network solutions to meet performance, capacity, resiliency, and cybersecurity compliance standards. Experience supporting enterprise-scale networks with high availability and reliability requirements. Strong foundational expertise in TCP/IP networking, including OSPF, EIGRP, and Layer 2 technologies such as VLANs and Ether Channel/Portchannel. Strong understanding of packet trace analysis and multi-layer troubleshooting techniques. Experience supporting SNA/APPN networking. Working knowledge of switches, firewalls, load balancers, VPNs, certificates, TLS/SSL, and REST APIs. Experience using IBM Netview and IBM Omegamon automation and performance tools. Assembler and REXX programming skills.