Senior Mainframe Network Engineer

Insight Global is seeking a Senior Mainframe Network Engineer for a large financial client in Chandler, AZ. Responsibilities include:

· 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.

We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment regardless of their race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or recruiting process, please send a request to HR@insightglobal.com.To learn more about how we collect, keep, and process your private information, please review Insight Global’s Workforce Privacy Policy: https://insightglobal.com/workforce-privacy-policy/.

Must Haves:

· 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. Plusses:

· Experience using IBM Netview and IBM Omegamon automation and performance tools.

· Assembler and REXX programming skills.