Mainframe Network Engineer

Computer Task Group, Inc•Phoenix, AZ

2d•Hybrid

About The Position

Responsible for designing, supporting, and optimizing enterprise mainframe network infrastructure. This role ensures secure, reliable, and high-performance connectivity between IBM mainframes (z/OS), distributed systems, cloud environments, and external partners in support of critical business operations.

Requirements

5+ years of experience in mainframe networking or enterprise infrastructure support
Strong expertise in IBM mainframe communications (VTAM, TCP/IP, SNA, TN3270, FTP)
Experience with z/OS networking and subsystem configuration
Strong troubleshooting, performance tuning, and RCA skills
Knowledge of enterprise network security principles
Experience supporting hybrid mainframe and distributed/cloud environments
Strong documentation and communication skills
Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.

Responsibilities

Design, configure, and support mainframe network environments and connectivity solutions
Manage IBM mainframe communications including VTAM, TCP/IP, SNA, TN3270, and FTP
Troubleshoot complex connectivity issues and perform root cause analysis
Support z/OS network services and communication subsystems
Ensure secure connectivity including firewall, encryption, and access controls
Collaborate with infrastructure, security, and application teams across enterprise initiatives
Support disaster recovery, high availability, and business continuity planning
Perform performance tuning and capacity planning for mainframe communications
Maintain technical documentation, standards, and operational procedures
Participate in incident response and change management processes
Support integration between mainframe, distributed, and cloud environments