Senior Mainframe Network Engineer | Hybrid, AI & Automation

Apptad Inc

Plano (TX)

Hybrid

USD 120,000 - 180,000

Full time

14 days+

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Job summary

Apptad Inc. in Plano, TX (Hybrid 3 days onsite weekly) seeks a Senior Mainframe Network Engineer to design and operate mainframe TCP/IP, SNA/APPN integrations, and high-availability connectivity for mission-critical workloads.

The role emphasizes modernization of network architectures, observability improvements, and automation-driven reliability. You will advance automation/AI-assisted operations, diagnose complex routing and security issues, and support enterprise-scale networks with

Qualifications

Experience designing and operating mainframe network solutions.
Ability to analyze and optimize throughput and reliability.
Experience supporting enterprise-scale networks with high availability.

Responsibilities

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 EtherChannel/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.